2009 Fiscal Year Final Research Report
High-pressure phase equilibria and thermodynamic properties of silicate minerals and related materials in the lower mantle conditions
| Project/Area Number |
19340166
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Petrology/Mineralogy/Science of ore deposit
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| Research Institution | Gakushuin University |
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Principal Investigator |
AKAOGI Masaki Gakushuin University, 理学部, 教授 (30126560)
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| Co-Investigator(Renkei-kenkyūsha) |
KOJITANI Hiroshi 学習院大学, 理学部, 助教 (60291522)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 高圧相平衡 / 熱力学データ / 下部マントル / 玄武岩質地殻 / ペロブスカイト / ポストペロブスカイト / ポストスピネル / カルシウムフェライト |
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| Research Abstract |
Thermodynamic properties of silicate perovskite were measured and used to refine the post-spinel phase transition boundary at high pressure. Stability relations of calcium ferrite and CAS phase which contain large amounts of calcium, aluminum and alkali-metal elements were determined at high pressure. The phases occur as high pressure phases of basaltic crust subducted into the lower mantle. Some metal oxides with the perovskite structure were found to show the post-perovskite transition at lower pressure than that of silicate perovskite which occurs at the lowermost mantle. The high-pressure phase relations and thermodynamic properties of the metal oxides were determined.
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[Journal Article] High-pressure high temperature phase relations in MgAl2O42010
Author(s)
Kojitani, H., Enomoto, A., Tsukamoto, S., Akaogi, M., Miura, H., Yusa, H.
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Journal Title
Peer Reviewed
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[Journal Article] Takayama-Muromachi, E., Post-perovskite transitions in CaB4+O3 at high pressure2010
Author(s)
Akaogi, M., Shirako, Y., Kojitani, H., Takamori, S., Yamaura, K.
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Journal Title
Peer Reviewed
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[Journal Article] Takayama-Muromachi, E., Akaogi, M., Magnetic properties of high-pressure phase of CaRuO3 with post-perovskite structure2010
Author(s)
Shirako, Y., Satsukawa, H., Kojitani, H., Katsumata, T., Yoshida, M., Inaguma, Y., Hiraki, K., Takahashi, T., Yamaura, K.
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Journal Title
Peer Reviewed
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[Journal Article] High-pressure phase transitions of CaRhO3 perovskite, Phys2009
Author(s)
Shirako, Y., Kojitani, H., Akaogi, M., Yamaura, K., Takayama-Muromachi, E.
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Journal Title
Phys. Chem. Minerals 36
Pages: 455-462
Peer Reviewed
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[Journal Article] High-pressure phase relations in Ca2AlSiO5. 5 and energetics of perovskite-related materials with oxygen defects in the Ca2Si2O6-Ca2Al2O5 join2009
Author(s)
Kojitani, H., Wakabayashi, Y., Tejima, Y., Kato, C., Haraguchi, M., Akaogi, M.
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Journal Title
Phys. Earth Planet. Inter. 173
Pages: 349-353
Peer Reviewed
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[Journal Article] Pressure-induced transformation of 6H hexagonal to 3C perovskite structure in PbMnO32009
Author(s)
Oka, K., Azuma, M., Hirai, S., Belik, A.A., Kojitani, H., Akaogi, M., Takano, M., Shimakawa, Y.
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Journal Title
Inorg. Chem. 48
Pages: 2285-2288
Peer Reviewed
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[Journal Article] Synthesis and magnetic and charge transport properties of the correlated 4d post-perovskite CaRhO32009
Author(s)
Yamaura, K., Shirako, Y., Kojitani, H., Arai, M., Young, D.P., Akaogi, M., Nakashima, M., Katsumata, T., Inaguma, Y., Takayama-Muromachi, E.
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Journal Title
J. Am., Chem. Soc. 131
Pages: 2722-2726
Peer Reviewed
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[Journal Article] Low-temperature heat capacities, entropies and enthalpies of Mg2SiO4 polymorphs, andα-β-γand postspinel phase relations at high pressure2007
Author(s)
Akaogi, M., Takayama, H., Kojitani, H., Kawaji, H., Atake, T.
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Journal Title
Phys. Chem. Minerals 34
Pages: 169-183
Peer Reviewed
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