Local structure analysis around noble gas in minerals

2008 Fiscal Year Final Research Report

• Project/Area Number: 18740335
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Petrology/Mineralogy/Science of ore deposit
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: OKUBE Maki Tokyo Institute of Technology, 応用セラミックス研究所, 助教 (10397060)
• Project Period (FY): 2006 – 2008
• Keywords: 地球惑星物質 / XAFS / 希ガス / 局所構造

Research Abstract

地球惑星物質に微量に存在する希ガスは、地球惑星物質の起源や履歴といった情報を与える重要な物質であるが、その希ガス原子が固体物質中にどのような状態で存在しているかはまだ明らかでない。本研究では地球惑星物質内における希ガスの存在状態を知るため、さまざまな鉱物試料におけるXAFSを用いた希ガス近傍局所構造解析を行った。これまで希ガスは不活性であり吸着によって鉱物表面あるいは粒界などに存在するとの考えが支配的であったが、本研究から希ガスは従来考えられていたよりも、強い相互作用によって格子間に存在することが分かった。

Research Products

• [Journal Article] Determination of high-pressure phase equilibria of Fe_2O_3 using the Kawai-type apparatus equipped with sintered diamond (2009)
  • Author(s): Eiji Ito, HirosHi Fukui, Tomoo Katsura, Anton Shatzkiy, Atsushi Kubo, Sho Yokoshi, Kazuyuki Kawabe, Shuangmeng Zhai, Maki Okube, Akifumi Nozawa, and Ken-ichi Funakoshi
  • Journal Title: American Mineralogist 94 Pages: 205-209
  • Peer Reviewed
• [Journal Article] xidation state and effective pair potential of Fe4+ ions in perovskite-type SrFeO_3 annealed under high oxygen pressure (2008)
  • Author(s): M Okube, Y Furukawa, A Yoshiasa, T Hashimoto, M Sugahara and A Nakatsuka
  • Journal Title: Journal of Physics : Conference Series 121 Pages: 092004(4pp)
  • Peer Reviewed
• [Journal Article] Single-crystal X-ray diffraction study of CaIrO3 (2008)
  • Author(s): Masahiko Sugahara, Akira Yoshiasa, Akira Yoneda, Takafumi Hashimoto, Syunsuke Sakai, Maki Okube, Akihiko Nakatsuka, and Osamu Ohtaka
  • Journal Title: American Mineralogist 93 Pages: 1148-1152
  • Peer Reviewed
• [Journal Article] Cation distribution and valence state in Mn-Zn ferrite examined by synchrotron X-rays (2008)
  • Author(s): Syoichi Sakurai, Satoshi Sasaki, Maki Okube, Hiroki Ohara, Takeshi Toyoda
  • Journal Title: Physica B 403 Pages: 3589-3595
  • Peer Reviewed
• [Journal Article] Local structure and effective pair potential of rock-salt type and disordered rock-salt type AgI under pressure (2008)
  • Author(s): A Yoshiasa, H Arima, H Fukui, O Ohtaka, O Kamishima, M Okube and Y Katayama
  • Journal Title: Journal of Physics: Conference Series 121 Pages: 022011(6pp)
  • Peer Reviewed
• [Journal Article] Temperature dependence of EXAFS Debye-Waller factor in the high pressure perovskite SrGeO_3 (2008)
  • Author(s): T Hashimoto, A Yoshiasa, M Sugahara, H Arima, H Fukui, Kei-ichiro Murai and M Okube
  • Journal Title: Journal of Physics: Conference Series 121 Pages: 102002(4pp)
• [Journal Article] RXMS study of non-collinear spin structure of BaFe_<10>CoTiO_<19> (2008)
  • Author(s): MAKI OKUBE, SEIJI OHSAWA, SATOSHI SASAKI, TAKESHI TOYODA, TAKEHARU MORI
  • Journal Title: Acta Crystallographica A 64 Pages: C510-C511
• [Journal Article] High pressure synthesis and analysis of new yellow emission Sr_2ZnS_3:Eu visible-light driven phosphor (2008)
  • Author(s): V. Petrykin, M. Okube, S. Sasaki, M. Kakihana
  • Journal Title: Acta Crystallographica A 64 Pages: C485
• [Journal Article] X-ray magnetic circular dichroism and electronic state of cobalt atoms in La1-xMxCoO3 (M=Ca, Sr, Ba) (2008)
  • Author(s): SATOSHI SASAKI, HIROYUKI KATSURAGAWA, MAKI OKUBE, TAKAYASU HANASHIMA
  • Journal Title: Acta Crystallographica A 64 Pages: C523
• [Journal Article] Resonant X-ray scattering study on the cation distribution of BaTiAFe_<10>O_<19> (A=Mn, Co) (2008)
  • Author(s): YUYA ISHIDA, TAIKI NAKANISHI, TAKESHI TOYODA, MAKI OKUBE, SATOSHI SASAKI
  • Journal Title: Acta Crystallographica A 64 Pages: C510-C511
• [Journal Article] Local Structure Analysis around Kr in Minerals by XAFS (2007)
  • Author(s): M. Okube, A. Yoshiasa, T. Matsumoto, E. Ito, and Y. Terada
  • Journal Title: American Institute of Physics Conference Proceedings 882 Pages: 296
  • Peer Reviewed
• [Journal Article] Local Structure of Transition Elements ,,V, Cr, Mn, Fe and Zn in Al2SiO5 Polymorphs (2007)
  • Author(s): Y. Furukawa, A. Yoshiasa, H. Arima, M. Okube, K. Murai, and T. Nishiyama
  • Journal Title: American Institute of Physics Conference Proceedings 882 Pages: 235
  • Peer Reviewed
• [Journal Article] XAFS Study of As in K-T Boundary Clays (2007)
  • Author(s): S. Sakai, A. Yoshiasa, H. Arima, M. Okube, C. Numako, and T. Sato
  • Journal Title: American Institute of Physics Conference Proceedings 882 Pages: 274
  • Peer Reviewed
• [Journal Article] Temperature Dependence of XANES Spectra for ATiO_3, A2TiO_4 and TiO_2 Compounds with Structural Phase Transitions (2007)
  • Author(s): T. Hashimoto, A. Yoshiasa, M. Okube, H. Okudera, and A. Nakatsuka
  • Journal Title: American Institute of Physics Conference Proceedings 882 Pages: 428
  • Peer Reviewed
• [Journal Article] Pressure Dependence of Anharmonic Effective Pair Potentials in Rock Salt Type AgI (2007)
  • Author(s): A. Yoshiasa, H. Fukui, H. Arima, M. Okube, Y. Katayama, K.-I. Murai, M. Sugahara, and O. Ohtaka
  • Journal Title: American Institute of Physics Conference Proceedings 882 Pages: 569
  • Peer Reviewed
• [Presentation] RXMS study of non-collinear spin structure of BaFe_<10>CoTiO_<19> (2008)
  • Author(s): Maki Okube, Seiji Ohsawa, Satoshi Sasaki, Takeshi Toyoda, Takeharu Mori
  • Organizer: XXI Congress and General Assembly of the international Union of Crystallography
  • Place of Presentation: Osaka, Japan
  • Year and Date: 20080826-27
• [Presentation] X-ray magnetic circular dichroism and electronic state of cobalt atoms in La_<1-x>MxCoO_3 (M=Ca, Sr, Ba) (2008)
  • Author(s): Satoshi Sasaki, Hiroyuki Katsuragawa, Maki Okube, Takayasu Hanashima
  • Organizer: XXI Congress and General Assembly of the international Union of Crystallography
  • Place of Presentation: Osaka, Japan
  • Year and Date: 20080826-27
• [Presentation] High pressure synthesis and analysis of new yellow emission Sr_2ZnS_3:Eu visible-light driven phosphor (2008)
  • Author(s): V. Petrykin, M. Okube, S. Sasaki, M. Kakihana
  • Organizer: XXI Congress and General Assembly of the international Union of Crystallography
  • Place of Presentation: Osaka, Japan
  • Year and Date: 20080824-25
• [Presentation] 高圧高温下でのAgIの精密構造解析とイオン移動のダイナミクス (2008)
  • Author(s): 吉朝 朗、大高 理、有馬 寛、奥部真樹、福井宏史、片山芳則
  • Organizer: 日本セラミックス協会第22回秋季シンポジウム
  • Place of Presentation: 北九州国際会議場、福岡
  • Year and Date: 2008-09-18
• [Presentation] 共鳴磁気散乱法を用いたBaフェライトの磁気構造決定 (2008)
  • Author(s): 奥部真樹、大澤征司、石田雄也、佐々木 聡、豊田丈紫
  • Organizer: 3大学3全国共同利用研究所連研プロジェクト公開討論会
  • Place of Presentation: 東北大学、仙台
  • Year and Date: 2008-08-26
• [Presentation] High pressure and high temperature EXAFS and diffraction study of AgI (2008)
  • Author(s): Akira Yoshiasa, Hiroshi Arima, Hiroshi Fukui, Maki Okube, Yoshinori Katayama, Osamu Ohtaka
  • Organizer: XXI Congress and General Assembly of the international Union of Crystallography
  • Place of Presentation: Osaka, Japan
  • Year and Date: 2008-08-26
• [Presentation] (Mg_<1-x>Fe_x)_<1-δ>O固溶体単結晶の電気伝導機構と圧力依存性 (2008)
  • Author(s): 吉朝 朗、大高 理、奥部真樹、福井 宏之
  • Organizer: 日本地球惑星科学連合2008年大会
  • Place of Presentation: 幕張、千葉
  • Year and Date: 2008-05-25
• [Presentation] 地球内部物質に含有される希ガスの局所構造解析 (2007)
  • Author(s): 奥部真樹、松本拓也、伊藤英司、吉朝 朗
  • Organizer: 第48回高圧討論会
  • Place of Presentation: 鳥取県倉吉市
  • Year and Date: 2007-11-21
• [Presentation] Local structure around noble gas in terrestrial oxides (2007)
  • Author(s): Maki Okube, Takuya Matsumoto, Akira Yoshiasa, Eiji Ito
  • Organizer: International Association for the Advancement of High Pressure Science and Technology
  • Place of Presentation: Catania, Italy
  • Year and Date: 2007-09-20