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Hiroshi Kojitani
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Journal Article
High-pressure syntheses and crystal structure analyses of a new low-density CaFe 2 O 4 -related and CaTi 2 O 4 -type MgAl 2 O 4 phases
Takayuki Ishii, Giacomo Criniti, Elena Bykova, Leonid Dubrovinsky, Tomoo Katsura, Hidekazu Arii, Hiroshi Kojitani, Masaki Akaogi
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 July 2021
American Mineralogist (2021) 106 (7): 1105–1112.
Journal Article
The importance of cation–cation repulsion in the zircon–reidite phase transition and radiation-damaged zircon
Makoto Tokuda, Akira Yoshiasa, Hiroshi Kojitani, Saki Hashimoto, Seiichiro Uehara, Tsutomu Mashimo, Tsubasa Tobase, Masaki Akaogi
Journal: Mineralogical Magazine
Published: 22 May 2019
Mineralogical Magazine (2019) 83 (4): 561–567.
Journal Article
High-pressure phase transitions in MgCr 2 O 4 ·Mg 2 SiO 4 composition: Reactions between olivine and chromite with implications for ultrahigh-pressure chromitites
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 January 2018
American Mineralogist (2018) 103 (1): 161–170.
Journal Article
A shallow origin of so-called ultrahigh-pressure chromitites, based on single-crystal X-ray structure analysis of the high-pressure Mg 2 Cr 2 O 5 phase, with modified ludwigite-type structure
Takayuki Ishii, Noriyoshi Tsujino, Hidekazu Arii, Kiyoshi Fujino, Nobuyoshi Miyajima, Hiroshi Kojitani, Takehiro Kunimoto, Masaki Akaogi
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 October 2017
American Mineralogist (2017) 102 (10): 2113–2118.
Journal Article
Experimental and thermodynamic investigations on the stability of Mg 14 Si 5 O 24 anhydrous phase B with relevance to Mg 2 SiO 4 forsterite, wadsleyite, and ringwoodite
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 October 2017
American Mineralogist (2017) 102 (10): 2032–2044.
Journal Article
High-pressure high-temperature transitions in MgCr 2 O 4 and crystal structures of new Mg 2 Cr 2 O 5 and post-spinel MgCr 2 O 4 phases with implications for ultrahigh-pressure chromitites in ophiolites
Takayuki Ishii, Hiroshi Kojitani, Kiyoshi Fujino, Hitoshi Yusa, Daisuke Mori, Yoshiyuki Inaguma, Yoshitaka Matsushita, Kazunari Yamaura, Masaki Akaogi
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 January 2015
American Mineralogist (2015) 100 (1): 59–65.
Journal Article
High-pressure phase transitions in FeCr 2 O 4 and structure analysis of new post-spinel FeCr 2 O 4 and Fe 2 Cr 2 O 5 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
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 August 2014
American Mineralogist (2014) 99 (8-9): 1788–1797.
Journal Article
High-pressure Raman spectroscopy, vibrational mode calculation, and heat capacity calculation of calcium ferrite-type MgAl 2 O 4 and CaAl 2 O 4
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 January 2013
American Mineralogist (2013) 98 (1): 197–206.
Journal Article
Redetermination of high-temperature heat capacity of Mg 2 SiO 4 ringwoodite: Measurement and lattice vibrational model calculation
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 August 2012
American Mineralogist (2012) 97 (8-9): 1314–1319.
Journal Article
Structure refinement of high-pressure hexagonal aluminous phases K 1.00 Mg 2.00 Al 4.80 Si 1.15 O 12 and Na 1.04 Mg 1.88 Al 4.64 Si 1.32 O 12
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 August 2011
American Mineralogist (2011) 96 (8-9): 1248–1253.
Journal Article
High-pressure phase relations and crystal chemistry of calcium ferrite-type solid solutions in the system MgAl 2 O 4 -Mg 2 SiO 4
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 July 2007
American Mineralogist (2007) 92 (7): 1112–1118.
Journal Article
Thermochemistry and high-pressure equilibria of the post-perovskite phase transition in CaIrO 3
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 January 2007
American Mineralogist (2007) 92 (1): 229–232.
Journal Article
Aluminum substitution in stishovite and MgSiO 3 perovskite: High-resolution 27 Al NMR
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 February 2006
American Mineralogist (2006) 91 (2-3): 337–343.
Journal Article
Unquenchable hexagonal perovskite in high-pressure polymorphs of strontium silicates
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 May 2005
American Mineralogist (2005) 90 (5-6): 1017–1020.
Journal Article
Aluminum substitution in MgSiO 3 perovskite: Investigation of multiple mechanisms by 27 Al NMR
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 July 2003
American Mineralogist (2003) 88 (7): 1161–1164.