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Takumi Kikegawa
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Journal Article

P-V-T equation of state of hydrous phase A up to 10.5 GPa

Cuiping Yang, Toru Inoue, Takumi Kikegawa
Published: 01 January 2021
American Mineralogist (2021) 106 (1): 1–6.
DOI: https://doi.org/10.2138/am-2020-7132
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Decomposition boundary from high-pressure clinoenstatite to wadsleyite + stishovite in MgSiO 3

Shigeaki Ono, Takumi Kikegawa, Yuji Higo
Published: 01 September 2018
American Mineralogist (2018) 103 (9): 1512–1515.
DOI: https://doi.org/10.2138/am-2018-6313CCBY
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Stability and bulk modulus of Ni 3 S, a new nickel sulfur compound, and the melting relations of the system Ni-NiS up to 10 GPa

Satoru Urakawa, Ryosuke Matsubara, Tomoo Katsura, Tohru Watanabe, Takumi Kikegawa
Published: 01 April 2011
American Mineralogist (2011) 96 (4): 558–565.
DOI: https://doi.org/10.2138/am.2011.3578
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Density and seismic velocities of chromitite body in oceanic mantle peridotite

Kyoko N. Matsukage, Seiichi Kikuchi, Shigeaki Ono, Yu Nishihara, Takumi Kikegawa
Published: 01 October 2010
American Mineralogist (2010) 95 (10): 1422–1428.
DOI: https://doi.org/10.2138/am.2010.3498
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High-pressure magnetic transition in hcp-Fe

Shigeaki Ono, Takumi Kikegawa, Naohisa Hirao, Kenji Mibe
Published: 01 May 2010
American Mineralogist (2010) 95 (5-6): 880–883.
DOI: https://doi.org/10.2138/am.2010.3430
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Fe-Mg partitioning between perovskite and ferropericlase in the lower mantle

Takeshi Sakai, Eiji Ohtani, Hidenori Terasaki, Naoki Sawada, Yusuke Kobayashi, Masaaki Miyahara, Masahiko Nishijima, Naohisa Hirao, Yasuo Ohishi, Takumi Kikegawa
Published: 01 July 2009
American Mineralogist (2009) 94 (7): 921–925.
DOI: https://doi.org/10.2138/am.2009.3123
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High-pressure transition of CaCO 3

Shigeaki Ono, Takumi Kikegawa, Yasuo Ohishi
Published: 01 July 2007
American Mineralogist (2007) 92 (7): 1246–1249.
DOI: https://doi.org/10.2138/am.2007.2649
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Equation of state of the high-pressure polymorph of FeSi to 67 GPa

Shigeaki Ono, Takumi Kikegawa, Yasuo Ohishi
Published: 01 March 2007
European Journal of Mineralogy (2007) 19 (2): 183–187.
DOI: https://doi.org/10.1127/0935-1221/2007/0019-1713
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High-pressure study of FeS, between 20 and 120 GPa, using synchrotron X-ray powder diffraction

Shigeaki Ono, Takumi Kikegawa
Published: 01 November 2006
American Mineralogist (2006) 91 (11-12): 1941–1944.
DOI: https://doi.org/10.2138/am.2006.2347
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Equation of state and phase transition in KAlSi 3 O 8 hollandite at high pressure

Tristan Ferroir, Tsuyoshi Onozawa, Takehiko Yagi, Sebastien Merkel, Nobuyoshi Miyajima, Norimasa Nishiyama, Tetsuo Irifune, Takumi Kikegawa
Published: 01 February 2006
American Mineralogist (2006) 91 (2-3): 327–332.
DOI: https://doi.org/10.2138/am.2006.1879
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Equation of state of CaIrO 3 -type MgSiO 3 up to 144 GPa

Shigeaki Ono, Takumi Kikegawa, Yasuo Ohishi
Published: 01 February 2006
American Mineralogist (2006) 91 (2-3): 475–478.
DOI: https://doi.org/10.2138/am.2006.2118
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Post-aragonite phase transformation in CaCO3 at 40 GPa

Shigeaki Ono, Takumi Kikegawa, Yasuo Ohishi, Jun Tsuchiya
Published: 01 April 2005
American Mineralogist (2005) 90 (4): 667–671.
DOI: https://doi.org/10.2138/am.2005.1610
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Formation of metastable cubic-perovskite in high-pressure phase transformation of Ca(Mg, Fe, Al)Si 2 O 6

Yuki Asahara, Eiji Ohtani, Tadashi Kondo, Tomoaki Kubo, Nobuyoshi Miyajima, Toshiro Nagase, Kiyoshi Fujino, Takehiko Yagi, Takumi Kikegawa
Published: 01 February 2005
American Mineralogist (2005) 90 (2-3): 457–462.
DOI: https://doi.org/10.2138/am.2005.1649
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Equations of state of ZrSiO 4 phases in the upper mantle

Shigeaki Ono, Yoshinori Tange, Ikuo Katayama, Takumi Kikegawa
Published: 01 January 2004
American Mineralogist (2004) 89 (1): 185–188.
DOI: https://doi.org/10.2138/am-2004-0121
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Compressibility of phase Egg AlSiO 3 OH: Equation of state and role of water at high pressure

Carine B. Vanpeteghem, Eiji Ohtani, Tadashi Kondo, Kenichi Takemura, Takumi Kikegawa
Published: 01 October 2003
American Mineralogist (2003) 88 (10): 1408–1411.
DOI: https://doi.org/10.2138/am-2003-1002
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Thermal equation of state of omphacite

Yu Nishihara, Eiichi Takahashi, Kyoko Matsukage, Takumi Kikegawa
Published: 01 January 2003
American Mineralogist (2003) 88 (1): 80–86.
DOI: https://doi.org/10.2138/am-2003-0110
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Equation of state of Al-bearing stishovite to 40 GPa at 300 K

Shigeaki Ono, Takuma Suto, Kei Hirose, Yasuhiro Kuwayama, Tetsuya Komabayashi, Takumi Kikegawa
Published: 01 October 2002
American Mineralogist (2002) 87 (10): 1486–1489.
DOI: https://doi.org/10.2138/am-2002-1026
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In situ X-ray observation of the reaction dolomite = aragonite + magnesite at 900–1300 K

Miki Shirasaka, Eiichi Takahashi, Yu Nishihara, Kyoko Matsukage, Takumi Kikegawa
Published: 01 July 2002
American Mineralogist (2002) 87 (7): 922–930.
DOI: https://doi.org/10.2138/am-2002-0715
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Phase relations of CaCO 3 at high pressure and high temperature

Kaichi Suito, Junpei Namba, Takashi Horikawa, Yozo Taniguchi, Noriko Sakurai, Michihiro Kobayashi, Akifumi Onodera, Osamu Shimomura, Takumi Kikegawa
Published: 01 September 2001
American Mineralogist (2001) 86 (9): 997–1002.
DOI: https://doi.org/10.2138/am-2001-8-906
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