Faculty Profiles - Ishii Takayuki

Papers - Ishii Takayuki

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A Breakthrough in Pressure Generation by a Kawai-Type Multi-Anvil Apparatus with Tungsten Carbide Anvils Invited Reviewed

Takayuki Ishii, Zhaodong Liu, Tomoo Katsura

Engineering 5 ( 3 ) 434 - 440 2019.6

Phase Relations of Harzburgite and MORB up to the Uppermost Lower Mantle Conditions: Precise Comparison With Pyrolite by Multisample Cell High‐Pressure Experiments With Implication to Dynamics of Subducted Slabs Reviewed

Takayuki Ishii, Hiroshi Kojitani, Masaki Akaogi

Journal of Geophysical Research: Solid Earth 124 ( 4 ) 3491 - 3507 2019.4

High-Pressure Phase Relations and Crystal Structures of Postspinel Phases in MgV₂O₄, FeV₂O₄, and MnCr₂O₄: Crystal Chemistry of AB₂O₄ Postspinel Compounds Reviewed

Takayuki Ishii, Tsubasa Sakai, Hiroshi Kojitani, Daisuke Mori, Yoshiyuki Inaguma, Yoshitaka Matsushita, Kazunari Yamaura, Masaki Akaogi

Inorganic Chemistry 57 ( 11 ) 6648 - 6657 2018.5

Complete agreement of the post-spinel transition with the 660-km seismic discontinuity Reviewed

Takayuki Ishii, Rong Huang, Hongzhan Fei, Iuliia Koemets, Zhaodong Liu, Fumiya Maeda, Liang Yuan, Lin Wang, Dmitry Druzhbin, Takafumi Yamamoto, Shrikant Bhat, Robert Farla, Takaaki Kawazoe, Noriyoshi Tsujino, Eleonora Kulik, Yuji Higo, Yoshinori Tange, Tomoo Katsura

Scientific Reports 8 ( 1 ) 2018.4

High-pressure phase transitions in MgCr2O4·Mg2SiO4 composition: Reactions between olivine and chromite with implications for ultrahigh-pressure chromitites Reviewed

Masaki Akaogi, Airi Kawahara, Hiroshi Kojitani, Kazuaki Yoshida, Yuki Anegawa, Takayuki Ishii

American Mineralogist 103 ( 1 ) 161 - 170 2018.1

Phase relations and mineral chemistry in pyrolitic mantle at 1600–2200 °C under pressures up to the uppermost lower mantle: Phase transitions around the 660-km discontinuity and dynamics of upwelling hot plumes Reviewed

Takayuki Ishii, Hiroshi Kojitani, Masaki Akaogi

Physics of the Earth and Planetary Interiors 274 127 - 137 2018.1

Synthesis and crystal structure of Mg-bearing Fe9O11: New insight in the complexity of Fe-Mg oxides at conditions of the deep upper mantle Reviewed

American Mineralogist 2018

Phase Relations in the System MgSiO₃ -Al₂ O₃ up to 2300 K at Lower Mantle Pressures Reviewed

Zhaodong Liu, Masayuki Nishi, Takayuki Ishii, Hongzhan Fei, Nobuyoshi Miyajima, Tiziana Boffa Ballaran, Hiroaki Ohfuji, Takeshi Sakai, Lin Wang, Svyatoslav Shcheka, Takeshi Arimoto, Yoshinori Tange, Yuji Higo, Tetsuo Irifune, Tomoo Katsura

Journal of Geophysical Research: Solid Earth 122 ( 10 ) 7775 - 7788 2017.10

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 Reviewed

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

American Mineralogist 102 ( 10 ) 2113 - 2118 2017.10

Rapid decrease of MgAlO2.5 component in bridgmanite with pressure Reviewed

Z. Liu, T. Ishii, T. Katsura

Geochemical Perspectives Letters 12 - 18 2017.10

Pressure generation to 65 GPa in a Kawai-type multi-anvil apparatus with tungsten carbide anvils Reviewed

Takayuki Ishii, Daisuke Yamazaki, Noriyoshi Tsujino, Fang Xu, Zhaodong Liu, Takaaki Kawazoe, Takafumi Yamamoto, Dmitry Druzhbin, Lin Wang, Yuji Higo, Yoshinori Tange, Takashi Yoshino, Tomoo Katsura

High Pressure Research 37 ( 4 ) 507 - 515 2017.9

Single crystal synthesis of δ-(Al,Fe)OOH Reviewed

Takaaki Kawazoe, Itaru Ohira, Takayuki Ishii, Tiziana Boffa Ballaran, Catherine McCammon, Akio Suzuki, Eiji Ohtani

American Mineralogist 102 ( 9 ) 1953 - 1956 2017.9

Synthesis and crystal structure of LiNbO₃-type Mg₃Al₂Si₃O₁₂: A possible indicator of shock conditions of meteorites Reviewed

Takayuki Ishii, Ryosuke Sinmyo, Tetsuya Komabayashi, Tiziana Boffa Ballaran, Takaaki Kawazoe, Nobuyoshi Miyajima, Kei Hirose, Tomoo Katsura

American Mineralogist 102 ( 9 ) 1947 - 1952 2017.9

Shocked chromites in fossil L chondrites: A Raman spectroscopy and transmission electron microscopy study Reviewed

Surya S. Rout, Philipp R. Heck, Nestor J. Zaluzec, Takayuki Ishii, Jianguo Wen, Dean J. Miller, Birger Schmitz

Meteoritics & Planetary Science 52 ( 9 ) 1776 - 1796 2017.5

High-pressure high-temperature phase relations in FeTiO3 up to 35 GPa and 1600 °C Reviewed

M. Akaogi, K. Abe, H. Yusa, T. Ishii, T. Tajima, H. Kojitani, D. Mori, Y. Inaguma

Physics and Chemistry of Minerals 44 ( 1 ) 63 - 73 2016.8

Generation of pressures over 40 GPa using Kawai-type multi-anvil press with tungsten carbide anvils Reviewed

D. Druzhbin, R. Myhill

Review of Scientific Instruments 87 ( 2 ) 024501 - 024501 2016.2

High-pressure high-temperature transitions in MgCr2O4 and crystal structures of new Mg2Cr2O5 and post-spinel MgCr2O4 phases with implications for ultrahigh-pressure chromitites in ophiolites Reviewed

T. Ishii, H. Kojitani, K. Fujino, H. Yusa, D. Mori, Y. Inaguma, Y. Matsushita, K. Yamaura, M. Akaogi

American Mineralogist 100 ( 1 ) 59 - 65 2015.1

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

T. Ishii, H. Kojitani, S. Tsukamoto, K. Fujino, D. Mori, Y. Inaguma, N. Tsujino, T. Yoshino, D. Yamazaki, Y. Higo, K. Funakoshi, M. Akaogi

American Mineralogist 99 ( 8-9 ) 1788 - 1797 2014.8

High-pressure synthesis of the BaIrO3 perovskite: A Pauli paramagnetic metal with a Fermi liquid ground state Reviewed

J.-G. Cheng, T. Ishii, H. Kojitani, K. Matsubayashi, A. Matsuo, X. Li, Y. Shirako, J.-S. Zhou, J. B. Goodenough, C. Q. Jin, M. Akaogi, Y. Uwatoko

Physical Review B 88 ( 20 ) 2013.11

High-pressure phase transitions and subduction behavior of continental crust at pressure–temperature conditions up to the upper part of the lower mantle Reviewed

Takayuki Ishii, Hiroshi Kojitani, Masaki Akaogi

Earth and Planetary Science Letters 357-358 31 - 41 2012.12

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