Details of the Researcher

PHOTO

Takahiro Kuribayashi
Section
Graduate School of Science
Job title
Associate Professor
Degree

  • 博士（理学）（東北大学）

  • 修士（理学）（東北大学）

Committee Memberships 14

  • 日本結晶学会　編集委員

    2016/09 - Present

  • 日本鉱物科学会　会計幹事

    2016/09 - Present

  • 日本結晶学会　編集委員

    2016/09 - Present

  • 日本鉱物科学会　会計幹事

    2016/09 - Present

  • 日本鉱物科学会　和文誌編集委員

    2014/09 - Present

  • 日本鉱物科学会　和文誌編集委員

    2014/09 - Present

  • 日本鉱物科学会　選挙管理委員

    2014/09 - 2015/08

  • 日本鉱物科学会　選挙管理委員

    2014/09 - 2015/08

  • 日本高圧力学会　評議員，会計幹事

    2010/09 - 2012/08

  • 日本高圧力学会　評議員，会計幹事

    2010/09 - 2012/08

  • 日本岩石鉱物鉱床学会　選挙管理委員

    2004/09 - 2006/08

  • 日本岩石鉱物鉱床学会　選挙管理委員

    2004/09 - 2006/08

  • 鉱物若手の会　会計

    2001/09 - 2003/08

  • 鉱物若手の会　会計

    2001/09 - 2003/08

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Professional Memberships 5

  • The Society of Resource Geology

  • アメリカ鉱物学会(Mineralogical Society of America)

  • 日本高圧力学会

  • 日本結晶学会

  • 日本鉱物科学会

Research Interests 3

  • mineral

  • crystal structure

  • high-pressure single crystal X-ray diffraction

Research Areas 1

  • Natural sciences / Solid earth science /

Awards 2

  1. Sakurai Medal

    2020/09　Japan Association of Mineralogical Sciences　Hitachiite, Pb5Bi2Te2S6, a new mineral from the Hitachi mine, Ibaraki Prefecture, Japan. Mineralogical Magazine, 83, 733-739

  2. Young Scientist Award

    2005/09/22　日本鉱物学会　投稿論文による業績

Papers 124

  1. High-Pressure Neutron Diffraction Study on ε-FeOOH: The Spin-Reorientation Transition and Hydrogen-Bond Symmetrization

    Osamu Ikeda, Hajime Yamamoto, Asami Sano-Furukawa, Tatsuya Sakamaki, Takahiro Kuribayashi, Yukio Noda, Akio Suzuki

    Journal of the American Chemical Society　2025/01/23

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/jacs.4c11982 　

    ISSN： 0002-7863

    eISSN： 1520-5126

  2. P-V-T equation of state of α-ScOOH.

    Yoshiaki Ito, Osamu Ikeda, Tatsuya Sakamaki, Takahiro Kuribayashi, Akio Suzuki

    High Pressure Research　1-13　2022/06/14

    Publisher: Informa UK Limited

    DOI： 10.1080/08957959.2022.2089568 　

    ISSN： 0895-7959

    eISSN： 1477-2299

  3. Single-crystal X-ray structure refinement of Al-bearing superhydrous phase B

    Sho Kakizawa, Toru Inoue, Takahiro Kuribayashi

    Physics and Chemistry of Minerals　48　(8)　2021/08

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1007/s00269-021-01152-8 　

    ISSN： 0342-1791

    eISSN： 1432-2021

  4. Phase transitions of ScOOH under high pressure

    Yoshiaki Ito, Osamu Ikeda, Rintaro Ban, Taito Kubota, Tatsuya Sakamaki, Takahiro Kuribayashi, Akio Suzuki

    High Pressure Research　41　(3)　275-289　2021/07/03

    Publisher: Informa UK Limited

    DOI： 10.1080/08957959.2021.1964495 　

    ISSN： 0895-7959

    eISSN： 1477-2299

  5. Phase relations of the Al2O3–SiO2 system at 13–21 GPa and 2300–2800 K and a new high-pressure Al2Si2O7 phase

    Youmo Zhou, Tetsuo Irifune, Takahiro Kuribayashi

    Physics and Chemistry of Minerals　48　(7)　2021/07

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1007/s00269-021-01149-3 　

    ISSN： 0342-1791

    eISSN： 1432-2021

  6. Structure refinement of prehnite from Passaic County, New Jersey, USA

    Kazumasa Sugiyama, Toru Kawamata, Takahiro Kuribayashi

    Journal of Mineralogical and Petrological Sciences　116　(5)　272-276　2021

    DOI： 10.2465/JMPS.210318 　

    ISSN： 1345-6296

    eISSN： 1349-3825

  7. Structure refinement of prehnite from Passaic County, New Jersey, USA

    Kazumasa Sugiyama, Toru Kawamata, Takahiro Kuribayashi

    JOURNAL OF MINERALOGICAL AND PETROLOGICAL SCIENCES　116　(5)　272-276　2021

    DOI： 10.2465/jmps.210318 　

    ISSN： 1345-6296

    eISSN： 1349-3825

  8. Hitachiite, Pb5Bi2Te2S6, a new mineral from the Hitachi mine, Ibaraki Prefecture, Japan Peer-reviewed

    Takahiro Kuribayashi, Toshiro Nagase, Tatsuo Nozaki, Junichiro Ishibashi, Kazuhiko Shimada, Masaaki Shimizu, Koichi Momma

    Mineralogical Magazine　83　(5)　733-739　2019/10

    DOI： 10.1180/mgm.2019.45 　

    ISSN： 0026-461X

    eISSN： 1471-8022

  9. In-situ X-ray diffraction study on beta-CrOOH at high pressure and high-temperature Peer-reviewed

    Chikara Shito, Keitaro Okamoto, Yuki Sato, Ryuji Watanabe, Tomonori Ohashi, Kazuhiro Fuchizaki, Takahiro Kuribayashi, Akio Suzuki

    HIGH PRESSURE RESEARCH　39　(3)　499-508　2019/07

    DOI： 10.1080/08957959.2019.1642884 　

    ISSN： 0895-7959

    eISSN： 1477-2299

  10. In-situ X-ray diffraction study on β-CrOOH at high pressure and high-temperature Peer-reviewed

    Chikara Shito, Keitaro Okamoto, Yuki Sato, Ryuji Watanabe, Tomonori Ohashi, Kazuhiro Fuchizaki, Takahiro Kuribayashi, Akio Suzuki

    High Pressure Research　39　(3)　499-508　2019

    DOI： 10.1080/08957959.2019.1642884 　

    ISSN： 0895-7959

    eISSN： 1477-2299

  11. Texture and formation process of jasper, ‘Nishiki-ishi’ from Tsugaru region, Japan Peer-reviewed

    Toshiro NAGASE, Shiori ISHIKAWA, Takahiro KURIBAYASHI

    47　(3)　127-140　2018/11

    DOI： 10.2465/gkk.171018 　

    More details Close

    Nishiki-ishi is a kind of jasper and shows mixed bright red, yellow-brown, green, and black colors. It occurs in Tsugaru region, Aomori Prefecture Japan and has been used for ornaments. Most of the raw stones are usually collected at shingle beaches, and few outcrops of the jasper are found out. Therefore, the occurrence of Nishiki-ishi has not been reported in detail. To elucidate the formation process of Nishiki-ishi, we observed textures of the rocks and minerals by optical and electron microscopes, Raman spectroscopy and analyzed the chemical compositions of minerals by an electron micro-probe analyzer.<br />  Nishiki-ishi were collected from two localities: Aoiwa, Nakadomari-machi, Kita-Tsugaru and Tappi-zaki, Sotogahama, Higashi-Tsugaru, Aomori Prefecture, Japan. It mainly consists of mixtures of micro-crystalline and crypto-crystalline quartz, opal-CT and iron-containing minerals.<br />  Its colors are caused by iron-containing minerals; hematite (red), celadonite (green), goethite (yellow), siderite (yellow), pyrite (black), and marcasite (black). These iron-containing minerals, which exhibit needle-like or granular forms, are included as fine grains in quartz crystal and fill boundaries among the quartz crystals.<br />  The macroscopic structure of Nishiki-ishi is breccia-like or clastic. In the texture, breccia fragments show yellow or red colors, and green and black parts filled up the space between breccia fragments. Yellow-brown and red color parts of Nishiki-ishi have flamboyant and mosaic (jigsaw) textures, which consist of micro-quartz and optically length-slow type spherules of quartz. Black and green color parts are also composed of opal-CT, chalcedony, and micro-quartz. These features are considerable differences of quartz textures between in brecciated fragments and at the matrix among brecciated fragments. Nishiki-ishi was formed by silicification of volcanic rocks during volcanic activity. After the silicified rocks brecciated, quartz and chalcedony precipitated in the breccia.

  12. Hitachiite, IMA 2018-027 Peer-reviewed

    KURIBAYASHI Takahiro, NAGASE Toshiro, NOZAKI Tatsuo, ISHIBASHI Junichiro, SHIMADA K, SHIMIZU Masaoki

    Mineralogical Magazine　82　2018/08

  13. New high-pressure forms of Al2SiO5 Peer-reviewed

    ZHOU Y, IRIFUNE Tetsuo, OHFUJI Hiroaki, KURIBAYASHI Takahiro

    Geophysical Research Letters　45　(16)　8167-8172　2018/08

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2018GL078960 　

    ISSN： 0094-8276

    eISSN： 1944-8007

  14. Determination of Al/Si order in sillimanite by high angular resolution electron channeling X-ray spectroscopy, and implications for determining peak temperatures of sillimanite Peer-reviewed

    Yohei Igami, Takahiro Kuribayashi, Akira Miyake

    American Mineralogist　103　(6)　944-951　2018/06/26

    DOI： 10.2138/am-2018-6351 　

    ISSN： 0003-004X

    eISSN： 1945-3027

  15. Texture analyses of pseudomorphs of silica minerals

    Nagase Toshiro, Momma Koichi, Ishibashi Takashi, Hamane Daisuke Nishio-, Kuribayashi Takahiro

    Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences　2018　(0)　38-38　2018

    Publisher: Japan Association of Mineralogical Sciences

    DOI： 10.14824/jakoka.2018.0_38 　

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    Metastable phases of silica minerals, which are opal, cristobalite, moganite, melanophlogite, chibaite, etc, precipitate under low-temperature hydrothermal solutions. The metastable silica minerals change to the stable phase quartz. After the phase transition, the crystal shapes remain intact, and pseudomorphs after the metastable minerals are observed. We carried out crystallographical analyses for the textures of the pseudomorphs after the metastable minerals by using scanning and transmission electron microscopes and EBSD method.

  16. P-V-T equation of state of synthetic guyanaite Peer-reviewed

    Shito Chikara, Okamoto Keitaro, Sato Yuki, Watanabe Ryuji, Ohashi Tomonori, Fuchizaki Kazuhiro, Kuribayashi Takahiro, Suzuki Akio

    Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences　2018　(0)　84-84　2018

    Publisher: Japan Association of Mineralogical Sciences

    DOI： 10.14824/jakoka.2018.0_84 　

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    The compression behavior of distorted rutile-type hydrous minerals has attracted much interest because of their high stability under high-pressure conditions. We performed an X-ray diffraction experiment of synthetic guyanaite (β-CrOOH) with distorted rutile-type structure up to 6 GPa at 300-700 K. The data of P-V-T was fitted to a second-order Birch-Murnaghan EoS with following parameters: bulk modulus KT0 = 191±20 GPa, volumetric thermal expansion coefficient α = (3.3±1.5)×10-5 K-1.

  17. 津軽錦石の成因 Peer-reviewed

    長瀬敏郎, 石川志緒利, 栗林貴弘

    日本岩石鉱物科学会誌　2018

  18. Field reaction experiments of carbonate minerals in spring waters: natural analogue of geologic CO2 storage Peer-reviewed

    SORAI Masao, SASAKI, Munetake, KURIBAYASHI Takahiro

    Geofuilds　2018　2018/01

    DOI： 10.1155/2018/2141878 　

  19. Thermal behavior of modulated haüyne from eifel, germany: In situ high-temperature single-crystal x-ray diffraction study Peer-reviewed

    Takahiro Kuribayashi, Satoshi Aoki, Toshiro Nagase

    Journal of Mineralogical and Petrological Sciences　113　(1)　51-55　2018

    DOI： 10.2465/jmps.161114d 　

    ISSN： 1345-6296

    eISSN： 1349-3825

  20. High-pressure phase transition of lawsonite at ~4GPa

    OKAMOTO Keitaro, KURIBAYASHI Takahiro, NAGASE Toshiro

    Photon Factory Activity Reports 2016 Part B　34　227-227　2017/08

  21. Structural Properties of Al-replaced Phase D

    KURIBAYASHI Takahiro, INOUE Toru, NAGASE Toshiro

    Photon Factory Activity Reports 2016 Part B　34　78-78　2017/08

  22. Cation ordering in iridescent garnet from Tenkawa village, Nara prefecture, Japan Peer-reviewed

    Yurie Nakamura, Takahiro Kuribayashi, Toshiro Nagase, Hiroyuki Imai

    JOURNAL OF MINERALOGICAL AND PETROLOGICAL SCIENCES　112　(2)　97-101　2017/04

    DOI： 10.2465/jmps.161114a 　

    ISSN： 1345-6296

    eISSN： 1349-3825

  23. Kinetic effect on the cation-ordering of mineral in crystal growth process

    NAGASE Toshiro, KURIBAYASHI Takahiro, NAKAMURA Yurie

    Photon Factory Activity Reports 2016 Part B　34　154-154　2017

  24. 乱れた構造を有する天然鉱物結晶の精密構造解析2

    栗林貴弘, 青木聡志, 折尾寛太, 長瀬敏郎, 杉山一正

    金属材料研究所平成28年度研究部共同研究報告書　268-269　2017

  25. Infrared spectroscopic study of OH defects in monazite Peer-reviewed

    A. B.E. Takeyasu, Takahiro Kuribayashi, Michihiko Nakamura

    European Journal of Mineralogy　29　(6)　949-957　2017

    Publisher: E. Schweizerbart'sche Verlagsbuchhandlung

    DOI： 10.1127/ejm/2017/0029-2663 　

    ISSN： 0935-1221

  26. Cation ordering of {110} and {211} sectors in grandite garnet from Mali Peer-reviewed

    Yurie Nakamura, Takahiro Kuribayashi, Toshiro Nagase

    JOURNAL OF MINERALOGICAL AND PETROLOGICAL SCIENCES　111　(6)　385-397　2016/12

    DOI： 10.2465/jmps.160312 　

    ISSN： 1345-6296

    eISSN： 1349-3825

  27. OH defects in synthetic xenotime (YPO4) Peer-reviewed

    Takeyasu Abe, Takaihro Kuribayashi, Michihiko Nakamura

    EUROPEAN JOURNAL OF MINERALOGY　28　(3)　641-648　2016/05

    DOI： 10.1127/ejm/2016/0028-2526 　

    ISSN： 0935-1221

    eISSN： 1617-4011

  28. ヒューマイトグループ鉱物の熱的特性

    栗林貴弘, 住岡慶子

    東京工業大学共同利用研究報告書2015 - 2016　(19)　82-83　2016

  29. 乱れた構造を有する天然鉱物結晶の精密構造解析

    栗林貴弘, 青木聡, 長瀬敏郎, 杉山和正

    金属材料研究所平成27年度研究部共同研究報告書　299-300　2016

  30. Synthesis of large and homogeneous single crystals of water-bearing minerals by slow cooling at deep-mantle pressures Peer-reviewed

    Takuo Okuchi, Narangoo Purevjav, Naotaka Tomioka, Jung-Fu Lin, Takahiro Kuribayashi, Louise Schoneveld, Huijeong Hwang, Naoya Sakamoto, Noriyuki Kawasaki, Hisayoshi Yurimoto

    AMERICAN MINERALOGIST　100　(7)　1483-1492　2015/07

    DOI： 10.2138/am-2015-5237 　

    ISSN： 0003-004X

    eISSN： 1945-3027

  31. Growth history and textures of quartz twinned in accordance with the Japan law Peer-reviewed

    KOICHI MOMMA, TOSHIRO NAGASE, TAKAHIRO KURIBAYASHI, YASUHIRO KUDOH

    European Journal of Mineralogy　27　(1)　71-80　2015/02/01

    DOI： 10.1127/ejm/2014/0026-2411 　

  32. Single crystal diffraction study on Al-bearing phase D

    Kuribayashi, T, Inoue, T, Nagase, T

    Photon Factory Activity Reports 2014 Part B　32　137-137　2015

  33. Structural Properties of (Al, H)-Bearing Bridgmanite, MgSi0.9Al0.1H0.1O3

    Kuribayashi, T, Inoue, T, Fujino, K, Nagase T

    Photon Factory Activity Reports 2014 Part B　32　152-152　2015

  34. ヒューマイトグループ鉱物の圧縮特性：ヒューム石について

    栗林貴弘

    東京工業大学共同利用研究報告書2014 - 2015　19　82-83　2015

  35. 低対称化した鉱物結晶に観察される秩序-無秩序構造に関する研究：分域の結晶構造に関して

    栗林貴弘, 長瀬敏郎, 中村友梨江, 杉山和正

    金属材料研究所平成26年度研究部共同研究報告書　172　2015

  36. Observation of pressure-induced phase transition of delta-AlOOH by using single-crystal synchrotron X-ray diffraction method Peer-reviewed

    Takahiro Kuribayashi, Asami Sano-Furukawa, Toshiro Nagase

    PHYSICS AND CHEMISTRY OF MINERALS　41　(4)　303-312　2014/04

    DOI： 10.1007/s00269-013-0649-6 　

    ISSN： 0342-1791

    eISSN： 1432-2021

  37. In situ high-temperature single-crystal X-ray diffraction study on scolecite

    栗林貴弘, 内田貴大, 長瀬敏郎

    東京工業大学共同利用研究報告書2013 - 2014　(18)　64-65　2014

  38. 低対称化した鉱物結晶に観察される秩序-無秩序構造に関する研究

    栗林貴弘, 長瀬敏郎, 中村友梨江, 杉山和正

    金属材料研究所平成25年度研究部共同研究報告書　158-158　2014

  39. 新規に合成されたAlに富む高圧含水相の結晶構造解析 Peer-reviewed

    栗林貴弘, 長瀬敏郎, 井上徹

    愛媛大学GRC, PRIUS2014年度研究成果報告書　2014

  40. Nagase Single-crystal X-ray diffraction study on Al, H-bearing MgSiO3

    T. Kuribayashi, T. Inoue, K. Fujino, T. Nagase

    . Photon Factory Activity Reports 2013 Part B　31　299-299　2014

  41. Crystal structure analysis of postd-AlOOH at 8.2 GPa

    T. Kuribayashi, A. Sano-Furukawa, T. Nagase

    Crystal structure analysis of post d-AlOOH at 8.2 GPa　(31)　310　2014

  42. Achiral Metastable Crystals of Sodium Chlorate Forming Prior to Chiral Crystals in Solution Growth Peer-reviewed

    Hiromasa Niinomi, Tomoya Yamazaki, Shunta Harada, Toru Ujihara, Hitoshi Miura, Yuki Kimura, Takahiro Kuribayashi, Makio Uwaha, Katsuo Tsukamoto

    CRYSTAL GROWTH & DESIGN　13　(12)　5188-5192　2013/12

    DOI： 10.1021/cg401324f 　

    ISSN： 1528-7483

    eISSN： 1528-7505

  43. Texture of lutecite Peer-reviewed

    Toshiro Nagase, Koichi Momma, Takahiro Kuribayashi, Masahiko Tanaka

    JOURNAL OF MINERALOGICAL AND PETROLOGICAL SCIENCES　108　(2)　87-93　2013/04

    DOI： 10.2465/jmps.111017 　

    ISSN： 1345-6296

    eISSN： 1349-3825

  44. Crystal structures of swelling minerals Peer-reviewed

    T. Nagase, T. Kuribayashi, K.Momma, I. Kusachi

    Photon Factory Activity Reports 2012　30　246　2013

  45. Single Crystal X-Ray Diffraction Experiments of a Silica Clathrate Mineral Chibaite Peer-reviewed

    K. Momma, R. Miyawaki, T. Kuribayashi, T. Nagase

    Photon Factory Activity Reports 2012　30　244　2013

  46. The effects of pressure on the δ-AlOOH and post-transition phase up to 14 GPa

    T. Kuribayashi, A. Sano-Furukawa, T. Nagase

    Photon Factory Activity Reports　2012　(Part B)　243　2013

  47. Spinelの700°Cにおけるアニーリングと単結晶高温その場結晶構造解析, 東京工業大学共同利用研究報告書

    栗林貴弘, 長田直

    東京工業大学共同利用研究報告書2012 - 2013　17　41-42　2013

  48. Tanohataite, LiMn2Si3O8(OH): a new mineral from the Tanohata mine, Iwate Prefecture, Japan Peer-reviewed

    Toshiro Nagase, Hidemichi Hori, Mizuya Kitamine, Mariko Nagashima, Ahmadjan Abduriyim, Takahiro Kuribayashi

    JOURNAL OF MINERALOGICAL AND PETROLOGICAL SCIENCES　107　(3)　149-154　2012/06

    DOI： 10.2465/jmps.111130 　

    ISSN： 1345-6296

    eISSN： 1349-3825

  49. The effects of pressure on crystal structure of δ-AlOOH up to 9.0 GPa Peer-reviewed

    T.Kuribayashi, A. Sano-Furukawa, T. Nagase

    Photon Factory Activity Reports　29　261　2012

  50. Investigation of hydrogen sites of wadsleyite: A neutron diffraction study Peer-reviewed

    Asami Sano-Furukawa, Takahiro Kuribayashi, Kazuki Komatsu, Takehiko Yagi, Eiji Ohtani

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS　189　(1-2)　56-62　2011/11

    DOI： 10.1016/j.pepi.2011.07.003 　

    ISSN： 0031-9201

  51. The bond lengths of T-O and M-O of natural spinel (MgAl_2O_4) and its relation to equilibration temperature

    NAGATA Sunao, KURIBAYASHI Takahiro, NAGASE Toshiro

    Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences　2011　209-209　2011/09/05

    Publisher: Japan Association of Mineralogical Sciences

    DOI： 10.14824/jakoka.2011.0.205.0 　

    ISSN： 1348-6543

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    Spinel structure has two important sites; tetrahedral T-site and octahedral M-site. In the spinel series minerals, there is a relationship between the equilibration temperature and T-O and M-O lengths. The purpose of this study is tried to estimate the equilibration temperature of a natural spinel from Madagascar using T-O and M-O lengths. The chemical formula of this sample was determined as Mg0.94Fe0.04Al2.00O4 by EPMA analysis. Main crystallographic information were obtained by single crystal X-ray diffraction measurement as follows: the lattice constant (a) was 8.0915(6) Å, the oxygen fractional coordinates (u) was 0.26363(4). And the equilibration temperatures calculated from T-O and M-O lengths, which were corrected for the effect of iron, were 561 K and 585 K, respectively.

  52. ) 3.5GPaの高圧下におけるsuper hydrous phase B相の電子密度

    栗林貴弘

    東京工業大学共同利用研究報告書2010 - 2011　15　2011/04

  53. Estimation of hydrogen position in (Fe, Al)-bearing phase E structure using single-crystal diffraction data

    H. Uchiyama, T. Kuribayashi, Y. Kudoh

    Photon Factory Activity Reports　28　in press　2011

  54. Refinement of hydrogen position in super hydrous phase B, Mg10Si3H4O18, under high-pressure condition using single-crystal diffraction data

    T. Kuribayashi

    Photon Factory Activity Reports　28　in press　2011

  55. スラブやマントル鉱物の結晶構造中における水素原子の振る舞い Peer-reviewed

    栗林貴弘

    日本結晶学会誌　53　(1)　19-24　2011/01

    Publisher: The Crystallographic Society of Japan

    DOI： 10.5940/jcrsj.53.19 　

    ISSN： 0369-4585

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    This paper reviewed the hydrogen incorporations in crystal structures of some slab and mantle minerals based on the recent author's and the group's studies. The topics included 1) hydrogen positions in the crystal structures of Mg2SiO4 polymorphs, humite minerals and DHMS phases, and 2) the effects of hydrogen on the physical properties of these minerals.

  56. Montmorillonite Single Crystal

    NAKAZAWA Hiromoto, TANIGUCHI Takashi, KURIBAYASHI Takahiro

    Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences　2010　133-133　2010/09/23

    Publisher: Japan Association of Mineralogical Sciences

    DOI： 10.14824/jakoka.2010.0.130.0 　

    ISSN： 1348-6543

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    Montmorillonite (MT) is a rare mineral with which crystal structure analyses has not yet been achieved, though it is a very familiar mineral. Its single crystallization was tried using a high purity MT powder prepared by Keizo Suzuki (Hokkaido Univ.).After holding the MT (25-75wt%H2O) at 5.5GPa and 1700 °C for 1 hour, it processed by various cooling processes. The recovered samples were observed by OM. SEM and XRD. A part of them was investigated by the X-ray single crystal oscillation method.By quenching (〜1000 °C/min) from 1700 °C, MT crystals in the form of needle and in irregular forms were obtained. However, MT might not be stable even at low temperature, since it decomposed into the anhydrous silicates by slow cooling and by re-heating (>400 °C) after quenching to the room temperature.The present results suggest an availability to obtain MT single crystals for an X-ray sutructure analysis.

  57. Estimation of hydrogen position in super hydrous phase B, Mg10Si3H4O18, at 1.0 GPa using single-crystal diffraction data

    T. Kuribayashi, Y. Kudoh

    Photon Factory Activity Reports　27　192　2010/04

  58. Orientational ordering of three SiO4 tetrahedra in alpha '(L)- Ca1.5Sr0.5SiO4 that satisfies bond-valence requirements and avoids O-O repulsion Peer-reviewed

    Hironori Itoh, Fumito Nishi, Takahiro Kuribayashi, Yasuhiro Kudoh

    JOURNAL OF MINERALOGICAL AND PETROLOGICAL SCIENCES　104　(4)　234-240　2009/08

    DOI： 10.2465/jmps.071115 　

    ISSN： 1345-6296

    eISSN： 1349-3825

  59. Computational simulations of the structure of Japan twin boundaries in quartz Peer-reviewed

    Koichi Momma, Toshiro Nagase, Yasuhiro Kudoh, Takahiro Kuribayashi

    EUROPEAN JOURNAL OF MINERALOGY　21　(2)　373-383　2009/03

    DOI： 10.1127/0935-1221/2009/0021-1893 　

    ISSN： 0935-1221

    eISSN： 1617-4011

  60. Synchrotron X-ray analysis of norbergite, Mg(2.98)Fe(0.01)Ti(0.02)Si(0.99)O(4)(OH(0.31)F(1.69)) structure at high pressure up to 8.2 GPa Peer-reviewed

    Takahiro Kuribayashi, Masahiko Tanaka, Yasuhiro Kudoh

    PHYSICS AND CHEMISTRY OF MINERALS　35　(10)　559-568　2008/12

    DOI： 10.1007/s00269-008-0248-0 　

    ISSN： 0342-1791

  61. Precise determination of elastic constants by high-resolution inelastic X-ray scattering Peer-reviewed

    Hiroshi Fukui, Tomoo Katsura, Takahiro Kuribayashi, Takuya Matsuzaki, Akira Yoneda, Eiji Ito, Yasuhiro Kudoh, Satoshi Tsutsui, Alfred Q. R. Baron

    JOURNAL OF SYNCHROTRON RADIATION　15　618-623　2008/11

    DOI： 10.1107/S0909049508023248 　

    ISSN： 0909-0495

    eISSN： 1600-5775

  62. Thermal equation of state of magnesite to 32 GPa and 2073 K Peer-reviewed

    Konstantin D. Litasov, Yingwei Fei, Eiji Ohtani, Takahiro Kuribayashi, Kenichi Funakoshi

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS　168　(3-4)　191-203　2008/07

    DOI： 10.1016/j.pepi.2008.06.018 　

    ISSN： 0031-9201

    eISSN： 1872-7395

  63. The partially dehydrated structure of natural heulandite: An in situ high temperature single crystal X-ray diffraction study Peer-reviewed

    T. M. Khobaer, Takahiro Kuribayashi, Kazuki Komatsu, Yasuhiro Kudoh

    JOURNAL OF MINERALOGICAL AND PETROLOGICAL SCIENCES　103　(2)　61-76　2008/04

    DOI： 10.2465/jmps.070306 　

    ISSN： 1345-6296

    eISSN： 1349-3825

  64. Preferred orientation of hydroxylapatite crystals in shark teeth enamel

    Ono Akito, Kuribayashi Takahiro, Kudoh Yasuhiro

    Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences　2008　139-139　2008

    Publisher: Japan Association of Mineralogical Sciences

    DOI： 10.14824/jakoka.2008.0.139.0 　

    More details Close

    In this study, shark teeth enamel was investigated by mineralogycal technique. Hydroxylapatite was included in shark teeth enamel. Shark teeth enamel was observed by polarized microscopy.Shark teeth enamel was analyzed by XRPD method. Shark teeth enamel was examined in detail by polarized FT-IR microscopy. X-ray diffraction pattern was analyzed by using Weisenberg and precession camera. From the result, it was comfirmed that c-axies of hydroxylapatite was preferred oriented to direction of longitudinal enamel prism and direction where it is done to angle of about 30 degrees.

  65. Three kinds of Superstructures of Ge-bearing Wollastonite

    Nishi Fumito, kudoh Yasuhiro, Kuribayashi Takahiro, Miyawaki Ritsuro

    Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences　2008　135-135　2008

    Publisher: Japan Association of Mineralogical Sciences

    DOI： 10.14824/jakoka.2008.0.135.0 　

    More details Close

    Three kinds of superstructures of wollastonite were synthesized. The two among three are twice as large as the basic structure. However, they have different structures. One has the stacking of the two basic-wollastonite units with b/2 displacement. The other has the two non-displacement units of the basic wollastonite. The third superstructure is four times as large as the basic structure. It has the four non-displacement units of the basic wollastonite.

  66. Growth textures and twin boundary structures of quartz twinned after Japan Law

    Momma Koichi, Nagase Toshiro, Kuribayashi Takahiro, Kudoh Yasuhiro

    Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences　2008　152-152　2008

    Publisher: Japan Association of Mineralogical Sciences

    DOI： 10.14824/jakoka.2008.0.152.0 　

    More details Close

    Growth textures and twin boundary structures of quartz twinned after Japan Law were studied by observations of etch figures and cathode luminescence, and molecular dynamics (MD) simulations. Near the composition plane of Japanese twin, hourglass-shaped sectors are observed to have mosaic textures composed of polysynthetic Brazil twin. This sector corresponds to a growth sector of {10-11} or {01-11}, where the composition plane is smooth and flat {11-22}.From the MD simulations, it is shown that {11-22} is the only composition plane that does not incorporate dislocations, and that dislocations are not required at a junction of Japanese and Brazil twin boundaries.These facts indicate that {11-22} composition plane of Japanese twin serve as a source of Brazil twin during the course of growth.

  67. The effects of G-OH replacement on the compression of super hydrous phase B structure Peer-reviewed

    Kuribayashi T, Nagase T, Kojitani H, Akaogi M, Hemley R, Mao H-k, Kudoh Y

    Acta Crystallographica　A64　C90　2008

  68. The role of Japanese twin boundary in quartz as a source of Brazil twin Peer-reviewed

    Koichi Momma, Toshiro Nagase, Yasuhiro Kudoh, Takahiro Kuribayashi

    ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES　64　C591-C591　2008

    DOI： 10.1107/S0108767308081026 　

    ISSN： 2053-2733

  69. T, 2T and 4T wollastonites derived by the Ge substitution Peer-reviewed

    Nishi F, Kudoh Y, Kuribayshi T

    Acta Crystallographica　A64　C498　2008

  70. Ferroelastic and high-low spin transition by MEM using single crystal and X-ray emmision to 100 GPa Invited Peer-reviewed

    Yamanaka T, Kuribayashi T, Mao H-k, Hemley R.,Shu J, Liermann HP, Yang W, Xiao YM, Dera P, Mao W

    実験　A64　2008

  71. X-ray thermal diffuse scattering study of CdTe to examine elastic constants under high pressure

    Ohtsu D, Okube M, Kuribayashi T, Kudoh Y, Nakao A, Sasaki S

    KEK Activity Report　25　B183　2008

  72. Pressure dependence of the hydrogen-bond geometry in topaz-OD from neutron powder diffraction Peer-reviewed

    K. Komatsu, H. Kagi, W. G. Marshall, T. Kuribayashi, J. B. Parise, Y. Kudoh

    AMERICAN MINERALOGIST　93　(1)　217-227　2008/01

    DOI： 10.2138/am.2008.2483 　

    ISSN： 0003-004X

  73. Cation vacancies and possible hydrogen atom positions in Fe-bearing hydrous forsterite, Mg1.85Fe0.14Si0.99H0.06O4, synthesized at 13.5 GPa and 1400 degrees C Peer-reviewed

    Yasuhiro Kudoh, Takahiro Kuribayashi, Konstantin Litasov, Eiji Ohtani

    JOURNAL OF MINERALOGICAL AND PETROLOGICAL SCIENCES　102　(5)　306-310　2007/10

    DOI： 10.2465/jmps.070620a 　

    ISSN： 1345-6296

    eISSN： 1349-3825

  74. Site preference of cations in olivine structure

    IZUKA Miyuki, KURIBAYASHI Takahiro, KUDOH Yasuhiro

    Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences　2007　131-131　2007/09/22

    Publisher: Japan Association of Mineralogical Sciences

    DOI： 10.14824/jakoka.2007.0.128.0 　

    ISSN： 1348-6543

  75. Compressibility of CaAl2O4 Peer-reviewed

    伊東洋典, 宍戸統悦, 栗林貴弘, 工藤康弘

    日本鉱物学会・学術講演会,日本岩石鉱物鉱床学会学術講演会講演要旨集　2007　145　2007/09/22

    DOI： 10.14824/jakoka.2007.0.141.0 　

  76. Single-crystal X-ray diffraction study of high-pressure phases of KHCO3 Peer-reviewed

    K. Komatsu, H. Kagi, T. Nagai, T. Kuribayashi, J. B. Parise, Y. Kudoh

    AMERICAN MINERALOGIST　92　(8-9)　1270-1275　2007/08

    DOI： 10.2138/am.2007.2392 　

    ISSN： 0003-004X

  77. Pressure dependence of u parameter in ringwoodite up to 7.9 GPa Peer-reviewed

    Yasuhiro Kudoh, Takahiro Kuribayashi, Hiroki Mizobata, Eiji Ohtani, Satoshi Sasaki, Masahiko Tanaka

    JOURNAL OF MINERALOGICAL AND PETROLOGICAL SCIENCES　102　(1)　8-11　2007/02

    DOI： 10.2465/jmps.060316 　

    ISSN： 1345-6296

    eISSN： 1349-3825

  78. Origin of piezoelectricity for langasite A(3)Ga(5)SiO(14) (A = La and Nd) under high pressure Peer-reviewed

    N. Araki, H. Ohsato, K. Kakimoto, T. Kuribayashi, Y. Kudoh, H. Morikoshi

    JOURNAL OF THE EUROPEAN CERAMIC SOCIETY　27　(13-15)　4099-4102　2007

    DOI： 10.1016/j.jeurceramsoc.2007.02.177 　

    ISSN： 0955-2219

  79. Pressure induced amorphization of portlandite, Ca(OH)2 around 6 GPa.

    Takahara K, Kuribayashi T, Kudoh Y

    KEK Progress Report　2007

  80. Effect of Pressure on the crystal structure of phase G(D), Mg1.24Si1.76H2.48O6

    Kudoh Y, Kuribayashi T, Mizobata H, Ohtani E, Sasaki S, Tanaka M

    KEK Progress Report　2007

  81. Crystal structures of high-pressure phases in the alumina-water system: I. Single crystal X-ray diffraction and molecular dynamics simulation of eta-Al(OH)(3) Peer-reviewed

    Kazuki Komatsu, Takahiro Kuribayashi, Yasubiro Kudoh, Hiroyuki Kagi

    ZEITSCHRIFT FUR KRISTALLOGRAPHIE　222　(1)　1-12　2007

    DOI： 10.1524/akri.2007.222.1.1 　

    ISSN： 0044-2968

  82. 高圧下におけるヒューマイト族鉱物とphase Aの結晶構造変化 Invited Peer-reviewed

    栗林貴弘

    日本結晶学会誌　49　(4)　249-254　2007

    Publisher: The Crystallographic Society of Japan

    DOI： 10.5940/jcrsj.49.249 　

    ISSN： 0369-4585

    More details Close

    High-pressure single crystal X-ray diffraction experiments and FT-IR observations of natural chondrodite, synthesized OH-chondrodite and phase A have been conducted. FT-IR observations of natural chondrodite showed that the peaks shifted to lower wave-numbers with increasing pressure. This suggested that hydrogen bonding would be formed in its structure under highpressure conditions.<BR>As results from X-ray diffraction experiments under high-pressure conditions, bulk moduli of these minerals were determined and their crystal structures were refined. The relationships between bulk modulus and packing index and summation of the filling factor for humite minerals and some DHMS phases were plotted on a simple positive line, respectively. Also, as results from structural refinements under high-pressure conditions, the polyhedral bulk moduli were obtained. Compression mechanism of humite minerals was controlled by the octahedral compression mainly.

  83. Redetermination of high-pressure modification of AlOOH Peer-reviewed

    K. Komatsu, T. Kuribayashi, A. Sano, E. Ohtani, Y. Kudoh

    Acta Crystallographyica Section E　62　i216-i218　2006/11

    DOI： 10.1107/S160053680603916X 　

  84. Cation vacancy and possible hydrogen positions in hydrous forsterite, Mg1.985Si0.993H0.06O4, synthesized at 13.5 GPa and 1300 degrees C Peer-reviewed

    Yasuhiro Kudoh, Takahiro Kuribayashi, Hiroyuki Kagi, Toru Inoue

    JOURNAL OF MINERALOGICAL AND PETROLOGICAL SCIENCES　101　(5)　265-269　2006/10

    DOI： 10.2465/jmps.101.265 　

    ISSN： 1345-6296

    eISSN： 1349-3825

  85. Bulk modulus and linear compressibilities of phase G, Mg1.24Si1.76H2.48O6.

    Kudoh Y, Kuribayashi T, Mizobata H, Ohtani E, Sasaki S, Tanaka M

    KEK Progress Report　2006

  86. The crystal structures of natural norbergite at 4.7 and 6.3 GPa conditions

    Kuribayashi T, Tanaka M, Kudoh Y

    KEK Progress Report　2006

  87. Single crystal X-ray diffraction study of high pressure phase of gibbsite

    Komatsu K, Kuribayashi T, Kudoh, Y

    KEK Progress Report　2006

  88. The linear compressibility of Portlandite single-crystal and the position of hydrogen under ambient pressure

    Takahara Kenshi, Komatsu Kazuki, Kuribayashi Takahiro, Kudoh Yasuhiro

    Abstracts for Annual Meeting of the Mineralogical Society of Japan　2005　66-66　2005

    Publisher: Japan Association of Mineralogical Sciences

    DOI： 10.14824/kobutsu.2005.0.66.0 　

  89. Origin of complicated internal growth texture in iridescent grandite garnet from Tenkawa, Nara, Japan

    Akizuku Mizuhiko, Itoh Yoshinori, Hori Hidemichi, Kuribayashi Takahiro, Nagase Toshiro

    Abstracts for Annual Meeting of the Mineralogical Society of Japan　2005　68-68　2005

    Publisher: Japan Association of Mineralogical Sciences

    DOI： 10.14824/kobutsu.2005.0.68.0 　

  90. Two kinds of Superstructures of Ge-bearing Wollastonite

    Nishi Fumito, Miyawaki Ritsuro, Kudoh Yasuhiro, Kuribayashi Takahiro

    Abstracts for Annual Meeting of the Mineralogical Society of Japan　2005　53-53　2005

    Publisher: Japan Association of Mineralogical Sciences

    DOI： 10.14824/kobutsu.2005.0.53.0 　

  91. The distribution of H atom in topaz-OH at high temperature

    Komatsu Kazuki, Kagi Hiroyuki, Kuribayashi Takahiro, Parise J.B., Kudoh Yasuhiro

    Abstracts for Annual Meeting of the Mineralogical Society of Japan　2005　28-28　2005

    Publisher: Japan Association of Mineralogical Sciences

    DOI： 10.14824/kobutsu.2005.0.28.0 　

  92. Crystal structure of MgAl2O4 unknown phase

    KUDOH Yasuhiro, KURIBAYASHI Takahiro, SUEDA Yuichiro, IRIFUNE Tetsuo

    Abstracts for Annual Meeting of the Mineralogical Society of Japan　2005　40-40　2005

    Publisher: Japan Association of Mineralogical Sciences

    DOI： 10.14824/kobutsu.2005.0.40.0 　

  93. MD simulations on stacking fault of silica minerals

    Momma Koichi, Nagase Toshiro, Kudoh Yasuhiro, Kuribayashi Takahiro

    Abstracts for Annual Meeting of the Mineralogical Society of Japan　2005　61-61　2005

    Publisher: Japan Association of Mineralogical Sciences

    DOI： 10.14824/kobutsu.2005.0.61.0 　

  94. Crystal structure of hydrous forsterite

    KUDOH Yasuhiro, KURIBAYASHI Takahiro, INOUE Toru

    Abstracts for Annual Meeting of the Mineralogical Society of Japan　2005　43-43　2005

    Publisher: Japan Association of Mineralogical Sciences

    DOI： 10.14824/kobutsu.2005.0.43.0 　

  95. Electron distributions in the tetrahedral-octahedral column in the structures of olivine and humite minerals, and its relation to the compression mechanism

    Kuribayashi Takahiro, Komatsu Kazuki, Sumioka Keiko, Ikeda Yohei, Kudoh Yasuhiro

    Abstracts for Annual Meeting of the Mineralogical Society of Japan　2005　49-49　2005

    Publisher: Japan Association of Mineralogical Sciences

    DOI： 10.14824/kobutsu.2005.0.49.0 　

  96. Single-crystal X ray study of hydrogen position in Humite structure

    Sumioka Keiko, Komatsu Kazuki, Kuribayashi Takahiro, Kudoh Yasuhiro

    Abstracts for Annual Meeting of the Mineralogical Society of Japan　2005　62-62　2005

    Publisher: Japan Association of Mineralogical Sciences

    DOI： 10.14824/kobutsu.2005.0.62.0 　

  97. Effect of pressure on the crystal structure of hydrous-ringwoodite up to 7.9 GPa

    Kudoh Y, Kuribayashi T, Mizobata H, Ohtani E, Sasaki S, Tanaka M

    Proceddings of Joint 20th AIRAPT - 43rd EHPRG　2005

  98. Single crystal X-ray diffraction study on high-pressure phase of KHCO3

    Komatsu K, Kagi H, Nagai T, Kuribayashi T, Parise JB, Kudoh Y

    Proceddings of Joint 20th AIRAPT - 43rd EHPRG　2005

  99. Effect of hydrogen on the density and compressibility of hydrous-ringwoodite

    Kudoh Y, Kuribayashi T, Mizobata H, Ohtani E, Sasaki S, Tanaka M

    KEK Progress Report　197-197　2005

  100. The compressibility of natural norbergite, Mg2.98Fe0.01Ti0.02Si0.99O8(OH0.31F1.69)

    Kuribayashi T, Tanaka M, Kudoh Y

    KEK Progress Report　200-200　2005

  101. Pressure dependence of the OH-stretching mode in F-rich natural topaz and topaz-OH Peer-reviewed

    K Komatsu, H Kagi, T Okada, T Kuribayashi, JB Parise, Y Kudoh

    AMERICAN MINERALOGIST　90　(1)　266-270　2005/01

    DOI： 10.2138/am.2005.1652 　

    ISSN： 0003-004X

  102. Space group and hydrogen sites of delta-AlOOH and implications for a hypothetical high-pressure form of Mg(OH)(2) Peer-reviewed

    Y Kudoh, T Kuribayashi, A Suzuki, E Ohtani, T Kamada

    PHYSICS AND CHEMISTRY OF MINERALS　31　(6)　360-364　2004/07

    DOI： 10.1007/s00269-004-0404-0 　

    ISSN： 0342-1791

  103. High-pressure single crystal X-ray diffraction and FT-IR observation of natural chondrodite and synthetic OH-chondrodite Peer-reviewed

    T Kuribayashi, H Kagi, M Tanaka, M Akizuki, Y Kudoh

    JOURNAL OF MINERALOGICAL AND PETROLOGICAL SCIENCES　99　(3)　118-129　2004/06

    DOI： 10.2465/jmps.99.118 　

    ISSN： 1345-6296

    eISSN： 1349-3825

  104. Structural behavior of hydrous ringwoodite at high pressure and its estimated maximum hydrogen content

    Kudoh Y, Kuribayashi T, Mizobata H, Ohtani E, Sasaki S, Tanaka M

    KEK Progress Report　199-199　2004

  105. Effect of pressure on the crystal structure of dense hydrous magnesium silicate Al-phase E

    Kudoh Y, Kuribayashi T, Sasaki S, Tanaka M

    KEK Progress Report　205-205　2004

  106. The effect of pressure on the crystal structure of humite, Mg7Si3O12(OH,F)2

    Kuribayashi T, Tanaka M, Kudoh Y

    KEK Progress Report　188-188　2004

  107. Compression of O-H...O distances of Phase A, Mg7Si2H6O14

    Kudoh Y, Kuribayashi T, Kagi H, Sasaki S, Tanaka M

    KEK Progress Report　162-162　2003

  108. Effect of pressure on the crystal structure of hydrous ringwoodite, g-Mg1.97SiH0.03O4

    Kudoh Y, Kuribayashi T, Mizobata H, Ohtani E, Sasaki S, Tanaka M

    KEK Progress Report　167-167　2003

  109. Crystal structure of hydrous ringwoodite, g-Mg1.97SiH0.03O4. Invited

    Kudoh Y, Kuribayashi T, Mizobata H, Ohtani E, Sasaki S, Tanaka M

    KEK Activity Report　205-205　2003

  110. Crystal structure of humite, Mg7Si3O12(OH,F)2 at 2.7 GPa

    Kuribayashi T, Kudoh Y, Tanaka M

    KEK Progress Report　170-170　2003

  111. Effect of temperature and pressure on the crystal structure of topaz, Al 2SiO 4(OH, F) 2 Peer-reviewed

    Kazuki Komatsu, Takahiro Kuribayashi, Yasuhiro Kudoh

    Journal of Mineralogical and Petrological Sciences　98　(5)　167-180　2003

    DOI： 10.2465/jmps.98.167 　

    ISSN： 1345-6296 1349-3825

  112. Compressibility of phase A, Mg 7Si 2H 6O i4 up to 11.2 GPa Peer-reviewed

    Takahiro Kuribayashi, Yasuhiro Kudoh, Hiroyuki Kagi

    Journal of Mineralogical and Petrological Sciences　98　(6)　215-234　2003

    DOI： 10.2465/jmps.98.215 　

    ISSN： 1345-6296 1349-3825

  113. High-pressure structural study of phase-A, Mg7Si2H6O14 using synchrotron radiation Peer-reviewed

    Y Kudoh, T Kuribayashi, H Kagi, S Sasaki, M Tanaka

    JOURNAL OF PHYSICS-CONDENSED MATTER　14　(44)　10491-10495　2002/11

    DOI： 10.1088/0953-8984/14/44/321 　

    ISSN： 0953-8984

  114. Neutron diffraction study of hydrous phase G: Hydrogen in the lower mantle hydrous silicate, phase G Peer-reviewed

    A Suzuki, E Ohtani, T Kondo, T Kuribayashi, N Niimura, K Kurihara, T Chatake

    GEOPHYSICAL RESEARCH LETTERS　28　(20)　3987-3990　2001/10

    DOI： 10.1029/2001GL013260 　

    ISSN： 0094-8276

  115. Triclinic liddicoatite and elbaite in growth sectors of tourmaline from Madagascar Peer-reviewed

    M Akizuki, T Kuribayashi, T Nagase, A Kitakaze

    AMERICAN MINERALOGIST　86　(3)　364-369　2001/03

    ISSN： 0003-004X

  116. Crystal structure of phase A, Mg7Si2H6O14 up to 9.4 GPa

    Kudoh Y, Kuribayashi T, Kagi H, Sasaki S, Tanaka M

    KEK Progress Report　181-181　2001

  117. Structure and cation disorder of hydrous ringwoodite, gamma-Mg1.89Si0.98H0.30O4 Peer-reviewed

    Y Kudoh, T Kuribayashi, H Mizobata, E Ohtani

    PHYSICS AND CHEMISTRY OF MINERALS　27　(7)　474-479　2000/08

    DOI： 10.1007/s002690000091 　

    ISSN： 0342-1791

  118. Crystal structure of hydrous ringwoodite, g-Mg1.98Si0.98H0.30O4 synthesized at 1300 C and 20 GPa Peer-reviewed

    Kudoh Y, Kuribayashi T, Mizohata H, Ohtani E

    Proceedings of International Conference on High Pressure Science and Technology (AIRAPT-17)　612-614　2000

  119. Crystal Structure of phase A at 9.1 GPa

    Kudoh Y, Kuribayashi T, Sasaki S, Tanaka M

    KEK Progress Report　225-225　2000

  120. Single crystal X-ray and FT-IR study on phlogopite and muscovite under high-pressure up to 8.5 GPa Peer-reviewed

    Kudoh Y, Hosono A, Iwaki B, Kuribayashi T, Akizuki M

    Proceedings of International Conference on High Pressure Science and Technology (AIRAPT-17)　615-617　2000

  121. Crystal Structure of g-Mg1.97SiH0.03O4 synthesized at 22 GPa and 1680 C.

    Kudoh Y, Kuribayashi T, Mizohata H, Ohtani E, Sasaki S, Tanaka M

    KEK Progress Report　210-210　1999

  122. Forum

    Japanese Magazine of Mineralogical and Petrological Sciences　27　(4)　237-242　1998

    Publisher: Japan Association of Mineralogical Sciences

    DOI： 10.2465/gkk1952.27.237 　

    ISSN： 0454-1146

  123. Crystal Structure of Chondrodite at 5.5 GPa

    Kudoh Y, Kuribayashi T, Nagase T, Sasaki S, Tanaka M

    KEK Progress Report　117-117　1998

  124. Crystal structures of the {011}, {610}, and {010} growth sectors in brewsterite Peer-reviewed

    M Akizuki, Y Kudoh, T Kuribayashi

    AMERICAN MINERALOGIST　81　(11-12)　1501-1506　1996/11

    ISSN： 0003-004X

Show all ︎Show first 5

Misc. 42

  1. Reconsideration on the site preference of Cu/Zn in tetrahedrite using synchrotron AXS method

    原田敬太, 栗林貴弘, 山根崚, 長瀬敏郎, 杉山和正

    量子ビームサイエンスフェスタ(Web)　2023　2024

  2. Determination of Cu and Zn distribution in renierite by anomalous scattering

    山根崚, 栗林貴弘, 杉山和正

    量子ビームサイエンスフェスタ(Web)　2023　2024

  3. X線異常散乱法によるTennantite中のZnの空間分布の解明

    山根崚, 杉山和正, 栗林貴弘

    日本結晶学会年会講演要旨集　2023　2023

  4. Single Crystal AXS Diffraction at BL-6C

    徳田誠, 川又透, 市村卓視, 井上裕太郎, 牧野友紀, 栗林貴弘, 杉山和正

    量子ビームサイエンスフェスタ(Web)　2021　2022

  5. 単結晶X線異常散乱法による陽イオン分布と価数分布解析:BabingtoniteおよびUngarettiiteの解析

    徳田誠, 栗林貴弘, 杉山和正

    日本結晶学会年会講演要旨集　2021　2021

  6. 超高圧下における結晶構造と電子密度分布の解明：単結晶X線回折法によるアプローチ

    栗林貴弘

    KEK放射光Concept Design Report　281-282　2017/03

  7. 高圧含水鉱物の合成とそのキャラクタリゼーション

    井上徹, 柿澤翔, CAI Nao, 藤野清志, 栗林貴弘, 長瀬敏郎, GREAUX Steeve, 肥後祐司, 阪本直哉, 圦本尚義, 服部高典, 佐野亜沙美

    高圧討論会講演要旨集　56th　45　2015/10/27

    ISSN： 0917-6373

  8. Alに富む含水ブリッジマナイトの含水量の圧力依存性

    柿澤翔, 井上徹, 栗林貴弘, 圦本尚義

    日本鉱物科学会年会講演要旨集　2015　109　2015/09/18

    ISSN： 1348-6543

  9. 含水bridgmaniteの合成とキャラクタリゼーション

    INOUE TOORU, YABUKI TOMOMI, KAKIZAWA SHO, FUJINO KIYOSHI, YURIMOTO HISAYOSHI, KURIBAYASHI TAKAHIRO, NAGASE TOSHIRO

    高圧討論会講演要旨集　55th　10　2014/11/10

    ISSN： 0917-6373

  10. AlとHに富むMg‐bridgmaniteの合成とキャラクタリゼーション

    INOUE TOORU, YABUKI TOMOMI, KAKIZAWA SHO, FUJINO KIYOSHI, YURIMOTO HISAYOSHI, KURIBAYASHI TAKAHIRO, NAGASE TOSHIRO

    日本鉱物科学会年会講演要旨集　2014　114　2014/09/10

    ISSN： 1348-6543

  11. FE-SEM observation for nano-sized textures in chalcedony and agate

    NAGASE Toshiro, MOMMA Koichi, KURIBAYASHI Takahiro, YAMADA Ryo-ichi

    2013　53-53　2013/09/05

    ISSN： 1348-6543

  12. Internal texture of feldspar and quartz from granitic pegmatites

    SEGAWA Yuka, KURIBAYASHI Takahiro, NAGASE Toshiro

    2013　73-73　2013/09/05

    ISSN： 1348-6543

  13. An attempt at crystal orientation analysis on dendritic intergrowth texture of sphalerite and chalcopyrite by EBSD method

    TAKAHASHI Daichi, NAGASE Toshiro, KURIBAYASHI Takahiro, YAMADA Ryoichi

    2013　113-113　2013/09/05

    ISSN： 1348-6543

  14. Crystal structure refinements of spinel at 700℃ condition and after annealing by single crystal X-ray diffraction method

    KURIBAYASHI Takahiro, NAGATA Sunao

    2013　109-109　2013/09/05

    ISSN： 1348-6543

  15. Estimation of intracrystalline distribution coefficient of Mg-Fe ions in olivine using Cs-corrected STEM

    MIYAKE Akira, TOH Shoichi, FUKUNAGA Keiichi, KURIBAYASHI Takahiro

    2013　95-95　2013/09/05

    ISSN： 1348-6543

  16. NaClO3溶液成長におけるアキラルな準安定相を介したキラル結晶形成過程

    新家寛正, 原田俊太, 宇治原徹, 三浦均, 木村勇気, 栗林貴弘, 上羽牧夫, 塚本勝男

    結晶成長国内会議予稿集(CD-ROM)　43rd　ROMBUNNO.08AC11　2013

    ISSN： 0385-6275

  17. CL image analysis for growth history of quartz crystal

    NAGASE Toshiro, KURIBAYASHI Takahiro, YAMADA Ryoichi, MOMMA Koichi

    2012　88-88　2012/09/15

    ISSN： 1348-6543

  18. Crystal structure refinements of δ-AlOOH around 10GPa using single crystal X-ray diffraction method

    KURIBAYASHI Takahiro, SANO Asami, NAGASE Toshiro

    2012　81-81　2012/09/15

    ISSN： 1348-6543

  19. Mineralogical characteristics of low symmetrized garnet from Mali

    NAKAMURA Yurie, KURIBAYASHI Takahiro, NAGASE Toshiro

    2012　94-94　2012/09/15

    ISSN： 1348-6543

  20. Observation of the pressure induced structural transition of d-AlOOH with single-crystal X-ray diffraction method

    KURIBAYASHI Takahiro, SANO Asami, NAGASE Toshiro

    2011　207-207　2011/09/05

    ISSN： 1348-6543

  21. The effect of chemical composition on OH-stretching vibration band in brucite

    UCHIKAWA Tamaki, KURIBAYASHI Takahiro, KUDOH Yasuhiro

    2011　208-208　2011/09/05

    ISSN： 1348-6543

  22. TEM observations of textural change between quartz facet crystal and chalcedony

    NAGASE Toshiro, KURIBAYASHI Takahiro

    2011　133-133　2011/09/05

    ISSN： 1348-6543

  23. Internal texture of quartz pseudomorphs after chibaite

    MOMMA Koichi, NAGASE Toshiro, KURIBAYASHI Takahiro, SHIGEOKA Masako

    2011　146-146　2011/09/05

    ISSN： 1348-6543

  24. 単結晶X線回折実験で見る鉱物結晶中の水素と中性子回折実験での展開

    栗林貴弘

    中性子地球科学ニュースレター　5　10　2011/09

  25. 溶液から成長するNaClO3結晶のキラリティ発生の解明

    新家寛正, 塚本勝男, 栗林貴弘, 三浦均

    結晶成長国内会議予稿集(CD-ROM)　41st　ROMBUNNO.03AC04　2011

    ISSN： 0385-6275

  26. Estimation of Hydrogen position in super hydrous phase B under high-pressure conditions

    KURIBAYASHI Takahiro

    51　195-195　2010/10/11

    ISSN： 0917-6373

  27. Estimation of hydrogen positions in hydrous minerals under high-P conditions using X-ray diffraction method : II

    KURIBAYASHI Takahiro

    2010　109-109　2010/09/23

    ISSN： 1348-6543

  28. The Structures of Ge-bearing Olivines

    NISHI Fumito, MIYAWAKI Ritsuro, KUDOH Yasuhiro, KURIBAYASHI Takahiro

    2009　2010/04/07

    DOI： 10.14824/jakoka.2009.0.137.0 　

    ISSN： 1348-6543

  29. Effect of temperature for the structure of zirconia

    SAKAI Shinya, KURIBAYASHI Takahiro, KUDOH Yasuhiro

    2007　153-153　2007/09/22

    ISSN： 1348-6543

  30. Fluctuation of aluminum and moganite content in agate texture

    MOMMA Koichi, NAGASE Toshiro, KUDOH Yasuhiro, KURIBAYASHI Takahiro

    2007　124-124　2007/09/22

    ISSN： 1348-6543

  31. Infrared absorption spectra and Polytypism of Xonotlite, Ca_6Si_6O_<17>(OH)_2

    HIRANO Yoh, KURIBAYASHI Takahiro, KUDOH Yasuhiro

    2007　151-151　2007/09/22

    ISSN： 1348-6543

  32. Change of crystalline of silica minerals in silicified wood

    ONO Akito, KURIBAYASHI Takahiro, KUDOH Yasuhiro

    2007　155-155　2007/09/22

    ISSN： 1348-6543

  33. Crystal structure of K-exchanged heulandite

    KANEKO Yoichiro, KUDOH Yasuhiro, KURIBAYASHI Takahiro

    2007　149-149　2007/09/22

    ISSN： 1348-6543

  34. Structural variations of humite minerals and phase A under high-pressure conditions

    栗林貴弘

    日本結晶学会誌　49　(4)　2007/08

    DOI： 10.5940/jcrsj.49.249 　

  35. Cation vacancy and possible hydrogen positions of hydrous forsterite, Mg1.985Si0.993H0.06O4 synthesized at 13.5 GPa and 1300 degrees C (vol 101, pg 265, 2006)

    Yasuhiro Kudoh, Takahiro Kuribayashi, Toru Inoue

    JOURNAL OF MINERALOGICAL AND PETROLOGICAL SCIENCES　102　(2)　161-161　2007/04

    ISSN： 1345-6296

    eISSN： 1349-3825

  36. Cation vacancy and possible hydrogen positions of hydrous forsterite, Mg1.985Si0.993H0.06O4 synthesized at 13.5 GPa and 1300 degrees C (vol 101, pg 265, 2006)

    Yasuhiro Kudoh, Takahiro Kuribayashi, Toru Inoue

    JOURNAL OF MINERALOGICAL AND PETROLOGICAL SCIENCES　102　(1)　65-65　2007/02

    ISSN： 1345-6296

    eISSN： 1349-3825

  37. Superstructure of α'L-phase, Ca_<1.5>Sr_<0.5>SiO_4

    ITOH Hironori, NISHI Fumito, KURIBAYASHI Takahiro, KUDOH Yasuhiro

    2004　58-58　2004/09/22

    ISSN： 1348-6543

  38. Crystallographic features of microcrystalline quartz crystallized from low temperature hydrothermal solution

    MOMMA Koichi, NAGASE Toshiro, KUDOH Yasuhiro, KURIBAYASHI Takahiro, TANAKA Masahiko

    2004　75-75　2004/09/22

    ISSN： 1348-6543

  39. The compression properties of polyhedra in the norbergite structure

    KURIBAYASHI Takahiro, TANAKA Masahiko, KUDOH Yasuhiro

    2004　55-55　2004/09/22

    ISSN： 1348-6543

  40. Pressure-induced phase transition and transformation twin of kalicinite

    KOMATSU Kazuki, KAGI Hiroyuki, NAGAI Takaya, KURIBAYASHI Takahiro, PARISE Jhon B., KUDOH Yasuhiro

    2004　50-50　2004/09/22

    ISSN： 1348-6543

  41. 中性子イメージングプレートを用いたphase Gの構造解析

    鈴木昭夫, 大谷栄治, 新村信雄, 栗原和男, 茶竹俊行, 近藤忠, 栗林貴弘

    日本岩石鉱物鉱床学会学術講演会講演要旨集　1999　189　1999/09

  42. フオーラム 第17回IMA総会トロント会議の報告

    末野 重穂, 長瀬 敏郎, 栗林 貴弘

    鉱物学雑誌　27　(4)　237-242　1998/11

    Publisher: 日本鉱物学会

    ISSN： 0454-1146

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Books and Other Publications 1

  1. 日本の結晶学 (II) -その輝かしい発展 –

    栗林貴弘, 他多数

    日本結晶学会　2014

Presentations 3

  1. Determination of hydrogen sites of nominally anhydrous minerals of the mantle transition zone International-presentation

    A. Sano-Furukawa, T. Kuribayashi, K. Komatsu, T. Yagi, E. Ohtani

    1st Asia-Oceania Conference on Neutron Scattering　2011/11/20

  2. Refinements of the hydrogen positions in hydrous minerals under high-pressure conditions using single-crystal methods with synchrotron X-ray International-presentation

    T. Kuribayashi

    The Kumamoto International Symposium on Recent Advancements of Mineralogy and Petrology V And The Forth Meeting of Research Consortium on High-pressure Research　2011/09/28

  3. When does the chirality of NaClO3 crystals arise in solution growth? International-presentation

    Hiromasa Niinomi, Hitoshi Miura, Takahiro Kuribayashi, Katsuo Tsukamoto

    International Union of Crystallography 2011 (IUCr2011)　2011/08/22

Research Projects 16

  1. Optical Anormally in zeolite minerals Competitive

    1998/04 - Present

  2. The effects of pressure on the crystal structure of hydrous magnesium silicate Competitive

    1998/04 - Present

  3. Investigation of the hydration phenomenon of lower mantle minerals, focusing on the importance of Al3+ and Fe3+

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Hiroshima University

    2025/04/01 - 2029/03/31

  4. Quantifying the microbial contribution to the hydrothermal deposit formation toward the BIOre concept

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Japan Agency for Marine-Earth Science and Technology

    2023/04/01 - 2026/03/31

  5. Water transport to the lower mantle and its storage capacity

    Inoue Toru

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Hiroshima University

    2018/04/01 - 2022/03/31

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    This study took on the challenge of elucidating water in the lower mantle using state-of-the-art high-pressure experiments, synchrotron radiation X-ray diffraction, neutron diffraction techniques, and analytical techniques. In particular, we focused on the study of "hydrous bridgmanite," a stable high-pressure hydrous phase widely existed in the Earth's deep interior, to elucidate the transport of water into the lower mantle and its storage capacity. As a result, the importance of substitution of Al in deep Earth minerals was clarified, and the substitution mechanism strongly depends on the crystal structure (coordination number) of deep Earth minerals.

  6. Structure and properties of the core-mantle materials

    Suzuki Akio

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    Institution: Tohoku University

    2015/06/29 - 2020/03/31

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    We investigated the structure and properties of deep-Earth materials. We developed experimental techniques in collaboration with the A01-3 Group, using high pressure-temperature ultrasonic methods to measure the elastic wave velocities of hydrous and non-hydrous phases in the Earth's mantle. Moreover, we measured the velocities of silicate glasses, magmas, and metallic liquids under high pressure and temperature to study the heterogeneous structure of the Earth's deep interior. We conducted melting experiments on mantle materials under high pressure, and developed a model that attribute the chemical heterogeneity of the mantle to the transportation of ultrabasic magmas. Through the investigation of the solubility of nitrogen in silicate minerals at high pressure, we revealed that stishovite contains higher amounts of nitrogen compared to other minerals. Based on these experimental results, we proposed a new model for stishovite-transported nitrogen in the Earth's mantle and core.

  7. Deep Earth water research using synchrotron X-ray and neutron radiations

    INOUE Toru, YURIMOTO Hisayoshi, Greaux Steeve, CAI Nao, SUENAMI Hideki, KAKIZAWA Sho, XU Chaowen, NODA Masamichi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (A)

    2014/04/01 - 2018/03/31

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    We have explored the possible existence of water in the deep Earth by using the techniques of the state-of-the-art high-pressure synthesis experiment, synchrotron X-ray in situ observation and neutron scattering experiment. As the result, it became clear that bridgmanite, which is the most abundant mineral in the lower mantle, can contain significant amounts of water in its crystal structure. The fact was confirmed by chemical compositional change, possible existence of hydrogen and lattice constant change by single crystal X-ray diffraction, the detection of OH vibration peak by IR spectroscopy, the detection of hydrogen position by neutron diffraction, and the changes of physical properties such as bulk modulus. Furthermore, it became clarified that the similar substitution can occur in superhydrous phase B and phase D, which are the other high-pressure hydrous phases in the deep mantle.

  8. Quantitavie analysis of hydrogen sites and occupancies in deep-mantle hydrous minerals by time of flight single crystal neutron diffraction

    Okuchi Takuo, YAMASHITA Shigeru, KURIBAYASHI Takahiro

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Okayama University

    2014/04/01 - 2017/03/31

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    Water in the Earth has been transported from the oceans into its deep interior, where it forms hydrous deep mantle minerals. Wadsleyite and ringwoodite have been considered as the two most important host minerals incorporating this type of water as hydroxyl groups. To constrain the capacity of water in their structures and also to understand the effect of such water on their physical properties, it is essential to quantitatively determine the sites and occupancies of hydrogen in their structures. We thus conducted neutron time-of-flight Laue single crystal diffraction studies of synthetic crystals of them. Single crystals, which have size and quality suitable for the method, were synthesized by a newly-developed slow-cooling method at the relevant high pressure and temperature conditions. The structures of two hydrous minerals have been successfully determined in very high resolution in space.

  9. The studies on the structural varitations related to hydrogen bonding symmetrization of hydrous minerals

    Kuribayashi Takahiro

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: Tohoku University

    2013/04/01 - 2016/03/31

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    Single crystal X-ray diffraction studies on delta-AlOOH were conducted to clarify its structural change under high-pressure conditions. Around 8 GPa, the pressure induced phase transition was observed, which is second order phase transition. The space group was changed from P21nm to Pnnm. The evolutions of axial ratio (a/c and b/c) with pressure were significantly changed around the phase transition pressure. Structure determination of the post-transition phase was successful, and the O-O distance related to hydrogen bonding was significantly compressed with pressure. This findings shows that the hydrogen bonding in delta-AlOOH was made more strengthen. As the results, hydrogen in the post-transition phase was arranged disorderly between its two equivalent sites. Hydrogen bonding does not show the hydrogen bonding symmetrization strictly up to 8 GPa.

  10. Texture and growth process of low-crystallinity minerals from low-temperature solution

    Nagase Toshiro, KURIBAYASHI Takahiro, MIYAMOATO Tsuyoshi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: Tohoku University

    2013/04/01 - 2016/03/31

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    We researched about precipitation processes of low-crystallinity minerals, which have crystal structure with numerous defects, from low temperature solution on the basis of observations for their textures and occurrence. The low-crystallinity mineral, which precipitates under metastable condition or out of stable region, are major in mineral species on the earth, and contribute to the diversity of minerals. It is considered that origins of the metastable phase were effects of impurity and interface energy. We will propose a new model for nucleation process of low-crystallinity minerals.

  11. Incorporation mechanism of hydrogen into some minerals and its dynamical behavior at high pressure

    NAGAI Takaya, AKASAKA Masahide, KURIBAYASHI Takahiro, NFUKAZAWA Hiroshi, SANO Asami, UTSUMI Wataru

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    Institution: Hokkaido University

    2008 - 2012

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    More and more application of neutron diffraction technique is expected in the field of mineral physics in the near future. Crystallographic information about hydrogen positions in some important hydrous minerals was successfully obtained in quite wide range of pressure-temperature conditions. These could give some new insights of hydrogen positions in some mantle minerals, a pressure-induced hydrogen-bond symmetrization mechanism, the relationship between specific thermal expansion and dynamical behavior of hydrogen atoms, and the relationship between cationic substitution and hydrogen positions in some crustal minerals.

  12. Estimation of hydrogen positions in hydrous minerals under high-pressure conditions using ME analysis with single crystal X-ray diffraction data Competitive

    System: Basic Science Research on Life Science

    2008/04 -

  13. Single crystal study on high-temperature high-pressure structure of subduction zone minerals

    KUDOH Yasuhiro, KURIBAYASHI Yakahiro, KAGI Hiroyuki, SASAKI Satoshi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2006 - 2008

  14. 温度・圧力変化に伴う含水珪酸塩鉱物の構造変化に関する結晶学的研究

    栗林 貴弘

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 若手研究(B)

    Institution: 東北大学

    2006 - 2007

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    本研究の最終年度は,申請書の内容に基づいて,特に以下の点に関して研究を遂行した. 1.高圧下単結晶X線回折実験用ダイアモンドアンビルセルの改良 昨年度,試作したダイアモンドアンビルセルに対し,以下の点に関して,温度変化に伴う材質の選定(特に,バッキングプレートに関して)や,試料部周りの設計を再度行い,高温・高圧用単結晶X線回折実験用ダイアモンドアンビルセルの改良を行った.バッキングプレートに関しては,新たに立方晶CNをテストした. 2.高圧含水珪酸塩鉱物(super hydrous phase B相)の高圧実験 本研究内容の一部は,高エネルギー加速器研究機構の放射光共同利用課題(2006G262)に採択されており,その課題に基づいて,昨年度,合成した試料super hydrous phase B相(Mg_<10>Si_3O_<14>(OH)_4)の8GPa付近までの高圧下における放射光による単結晶X線回折実験を行い,super hydrous phase B(OH)相の体積弾性率と高圧下における結晶構造解析用強度データを収集,解析を行った.また,F素置換した試料に対しても,同様の回折実験を8GPa付近まで行い,OH⇔Fの置換に伴う圧縮機構の相違点について明らかにした. 3.温度と圧力の変化に伴う水素結合の振る舞いの観察 構造中に水素結合をもつとされるphase Aならびにnorbergiteの高圧下における構造変化と,低温下における水素結合の振る舞いについて,単結晶X線回折法ならびに赤外分光法よって構造を観察し,温度と圧力の効果に関する知見を得た.

  15. High temperature high pressure crystal structures and phase changes of subduction zone minerals.

    KUDOH Yasuhiro, KAGI Hiroyuki, KURIBAYASHI Takahiro, NAGASE Toshiro

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2001 - 2003

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    Sets of X-ray diffraction intensities up to 7.9 GPa of a single crystal of 35x35x24 micron hydrous ringwoodite Mg_<1.97>SiH_<0.06>O_4, synthesized by Ohtani and Mizobata (1998) using a multi-anvil apparatus at conditions of 1680 ℃ and 22 GPa were measured using synchrotron radiation at the beam line BL-10A, Photon Factory, High Energy Accelerator Research Organization, Tukuba, Japan. The modified Merrill-Bassett type diamond anvil pressure cell was used. The 4:1 fluid mixture of methanol and ethanol was used for pressure medium. The compressibility of the unit cell is close to the compressibility of the MO_6 octahedron. The mean Si-O distance stay almost constant up to 7.9 GPa. The compression of the crystal structure is governed by the compression of MO_6 octahedron. This is consistent to the fact that the bulk modulus is affected significantly by the substitution of Mg by 2H. The octahedral shared edges are compressed more than the unshared edges, keeping the edge lengths of SiO_4 tetrahedron almost constant. The space group and hydrogen positions of δ-(Al_<0.84>4Mg_<0.07>Si_<0.09>)OOH are investigated using a single crystal synthesized using a multi-anvil apparatus under conditions of 1000 ℃ and 21 GPa. The space group determined by single-crystal x-ray diffraction is to Pnn2, with unit cell parameters of a=4.6975(8)Å, b=4.2060(6)Å, c=2.8327(4)Å, and V=55.97(1)Å^3. Partial occupancy of the Al site by Mg and Si suggests the possibility of a limited solid solution between δ-AlOOH, stishovite, and a hypothetical CaCl_2-type Mg(OH)_2 that is 16% denser than brucite. Difference Fourier maps reveal two small but significant Fourier peaks attributable to hydrogen atoms. Atomic distances and angles around the first peak indicate a hydrogen bond with O【triple bond】O distances of 2.511Å, while those around the second peak are suggestive of a bifurcated hydrogen bond with O【triple bond】O distances of 2.743Å and 2.743Å.

  16. Structure and property analysis of hydrous mantle minerals under high pressure

    KUDOH Yasuhiro, KURIBAYASHI Takahiro

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B).

    Institution: Tohoku University

    1999 - 2000

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    Structure and property of some hydrous phases whose stability field correspond to that of upper mantle of the earth have been studied. It was found that there is probably continuous solid solution between hydrous and anhydrous wadsleyite. Small degree of Mg-Si disorder was found in the structure of hydrous ringwoodite. With increasing pressure, shifts of OH-stretching vibration band to higher wave numbers were observed in phlogopite, while shifts of OH-stretching vibration band to lower wave numbers were observed in muscovite. Structural behaviors of phase A and chondrodite under pressure were found to be similar to that of forsterite.

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Social Activities 2

  1. 鉱物にはなぜかたちがあるのだろう （東北大学総合学術博物館）

    2005/08/03 - 2005/08/04

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    地球や惑星を考える場合に，最小構成単位として取り扱う「鉱物」とはどういうもので，どんな性質を持っているものなのか？等について，主に小学生に対して，紹介する．

  2. ぶらりがく

    2017/04/01 -

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    理学部が主宰するぶらりがくにおいて、鉱物の形のふしぎ と題して主に小学生を対象として公開講座を行なった。

Other 8

  1. 単結晶ME解析によるphase E構造中の水素位置の推定

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    高圧含水マグネシウム鉱物であるphase E相に対して，高圧力下における結晶構造の精密化を放射光単結晶Ｘ線回折法により解明する．

  2. マキシマムエントロピー法と単結晶Ｘ線回折強度実験によるマントル鉱物の高圧下における電子 密度分布に関する研究

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    マキシマムエントロピー法を高圧下における単結晶Ｘ線回折強度データに適用し，高圧下におけるマントル鉱物中の電子密度分布の解明を試みる

  3. マントル鉱物中の水素位置と物理的性質への影響に関する研究

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    高圧下におけるマントル鉱物中の水素位置を単結晶Ｘ線回折実験によって推定することを試み，その結果から物理的性質，特に弾性率に対する影響について精査する．

  4. 単結晶MEM法による高圧下における鉱物結晶中の水素位置の推定

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    放射光単結晶Ｘ線回折実験により高圧下において，水素位置を含めた鉱物結晶の構造の精密化を行う研究．

  5. ＤＡＣを用いた単結晶Ｘ線回折法による高圧下の構造解析

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    高圧下における鉱物結晶の構造をその場観察により単結晶法を用いて精密化する

  6. Magic of Minerals and Rocks

  7. Illuite

  8. 天然ゼオライトー利用にあたっての品質評価基準ー

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