糀谷浩

研究者氏名	糀谷浩
	コウジタニヒロシ
URL
所属	学習院大学
部署	理学部化学科
職名	准教授
学位	博士(理学)(学習院大学), Ph.D(Gakushuin University)
科研費研究者番号	60291522
J-Global ID	200901050139239240

研究キーワード

熱化学 ,超高圧 ,鉱物物理学 ,Thermo Chemistry ,Ultra High-Pressure ,Mineral Physics

研究分野

自然科学一般 / 固体地球科学 /

経歴

12 3 >

2021年4月

現在

学習院大学理学部化学科准教授

2007年4月

2021年3月

学習院大学理学部化学科助教

2001年10月

2007年3月

学習院大学理学部化学科助手

2001年

2007年

:学習院大学理学部化学科助手

2007年

-:学習院大学理学部化学科助教

委員歴

2018年9月

現在

日本鉱物科学会広報委員

2018年9月

現在

日本高圧力学会評議員（庶務幹事）

2009年9月

2012年8月

日本高圧力学会高圧力学会誌の編集委員

2009年9月

2012年8月

The Japan Society of High Pressure Science and Technology Editor of the Journal "The Review of High Pressure Science and Tachnology"

受賞

2018年9月

日本鉱物科学会, 日本鉱物科学会賞,熱測定と分光学的手法によるマントル鉱物の熱力学的性質及び結晶構造に関する研究
糀谷浩

論文

12 3 4 5 >

Enthalpy, heat capacity and thermal expansivity measurements of MgSiO3 akimotoite: Reassessment of its self-consistent thermodynamic data set

Hiroshi Kojitani Monami Yamazaki Yuki Tsunekawa Shiho Katsuragi Masamichi Noda Toru Inoue Yoshiyuki Inaguma Masaki Akaogi

Physics of the Earth and Planetary Interiors 333 106937-106937 2022年12月 [査読有り]

High-pressure syntheses and crystal structure analyses of a new low-density CaFe2O4-related and CaTi2O4-type MgAl2O4 phases

Takayuki Ishii Giacomo Criniti Elena Bykova Leonid Dubrovinsky Tomoo Katsura Hidekazu Arii Hiroshi Kojitani Masaki Akaogi

American Mineralogist 106(7) 1105-1112 2021年7月 [査読有り]

Abstract

Three single crystals of CaTi2O4 (CT)-type, CaFe2O4 (CF)-type, and new low-density CaFe2O4 (LD-CF) related MgAl2O4 were synthesized at 27 GPa and 2500 °C and also CT-type MgAl2O4 at 45 GPa and 1727 °C using conventional and advanced mul...

Benefit of high-pressure structure on sodium transport properties: Example with NaFeF3 post-perovskite

Kevin Lemoine Agnieszka Wizner Sandy Auguste Jean-Marc Grenèche Hiroshi Kojitani Masaki Akaogi Yoshiyuki Inaguma

Open Ceramics 6 100123-100123 2021年6月 [査読有り]

Discovery of New‐Structured Post‐Spinel MgFe 2 O 4 : Crystal Structure and High‐Pressure Phase Relations

Takayuki Ishii Nobuyoshi Miyajima Ryosuke Sinmyo Hiroshi Kojitani Daisuke Mori Yoshiyuki Inaguma Masaki Akaogi

Geophysical Research Letters 47(6) 2020年3月 [査読有り]

High-Pressure and High-Temperature Phase Transitions in Fe2TiO4 and Mg2TiO4 with Implications for Titanomagnetite Inclusions in Superdeep Diamonds

M. Akaogi T. Tajima M. Okano H. Kojitani

Minerals 9(614) 1-12 2019年 [査読有り]

MISC

12 3 4 5 >

A shallow origin of so-called ultrahigh-pressure chromitites, based on single-crystal X-ray structure analysis of the high-pressure Mg2Cr2O5 phase, with modified ludwigite-type structure

Takayuki Ishii Noriyoshi Tsujino Hidekazu Arii Kiyoshi Fujino Nobuyoshi Miyajima Hiroshi Kojitani Takehiro Kunimoto Masaki Akaogi

AMERICAN MINERALOGIST 102(10) 2113-2118 2017年10月

The crystal structure of the high-pressure Mg2Cr2O5 phase was studied by single-crystal X-ray diffraction (XRD) analysis for the recovered samples. The 61 parameters including anisotropic displacement parameters of each atom and site occupancies o...

High-pressure phase transitions in FeCr2O4 and structure analysis of new post-spinel FeCr2O4 and Fe2Cr2O5 phases with meteoritical and petrological implications

Takayuki Ishii Hiroshi Kojitani Shoichi Tsukamoto Kiyoshi Fujino Daisuke Mori Yoshiyuki Inaguma Noriyoshi Tsujino Takashi Yoshino Daisuke Yamazaki Yuji Higo Kenichi Funakoshi Masaki Akaogi

AMERICAN MINERALOGIST 99(8-9) 1788-1797 2014年8月

We determined phase relations in FeCr2O4 at 12-28 GPa and 800-1600 degrees C using a multi-anvil apparatus. At 12-16 GPa, FeCr2O4 spinel (chromite) first dissociates into two phases: a new Fe2Cr2O5 phase + Cr2O3 with the corundum structure. At 17-...

High-pressure transitions in NaZnF3 and NaMnF3 perovskites, and crystal-chemical characteristics of perovskite-postperovskite transitions in ABX(3) fluorides and oxides

Masaki Akaogi Yuichi Shirako Hiroshi Kojitani Takayuki Nagakari Hitoshi Yusa Kazunari Yamaura

PHYSICS OF THE EARTH AND PLANETARY INTERIORS 228 160-169 2014年3月

Phase transitions in NaZnF3 and NaMnF3 were examined up to 24 GPa and 1100 degrees C using a multianvil apparatus. NaZnE3 perovskite transforms to postperovskite above 11-16 GPa at 600-1000 degrees C, and the postperovskite is quenchable at ambien...

Thermodynamic investigation on β- and γ-Ca₃(PO₄)₂ and the phase equilibria

S. Zhai M. Akaogi H. Kojitani W. Xue E. Ito

Phys. Earth Planet. Inter. 228 144-149 2014年3月

High-Pressure Synthesis, Crystal Structure, and Phase Stability Relations of a LiNbO3-Type Polar Titanate ZnTiO3 and Its Reinforced Polarity by the Second-Order Jahn-Teller Effect

Yoshiyuki Inaguma Akihisa Aimi Yuichi Shirako Daichi Sakurai Daisuke Mori Hiroshi Kojitani Masaki Akaogi Masanobu Nakayama

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 136(7) 2748-2756 2014年2月

A polar LiNbO3-type (LN-type) titanate ZnTiO3 has been successfully synthesized using ilmenite-type (IL-type) ZnTiO3 under high pressure and high temperature. The first principles calculation indicates that LN-type ZnTiO3 is a metastable phase obt...