2010 Fiscal Year Final Research Report
Phase behavior of ABO3-type compound under ultra high pressure
| Project/Area Number |
22840017
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Petrology/Mineralogy/Science of ore deposit
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| Research Institution | The University of Tokyo |
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Principal Investigator |
HAMANE Daisuke The University of Tokyo, 物性研究所, 特任専門職員 (20579073)
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| Project Period (FY) |
2010
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| Keywords | チタネイト / ダイアモンドアンビルセル / 放射光X線 / 透過型電子顕微鏡 |
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| Research Abstract |
In this study, We investigated the high pressure and temperature phase relation on ABO_3, which B cation consist of 4th group (titanium family), and then was able to obtain a new finding that overturned the common sense of a past high pressure science. Several titanite transformed to the form of AO+ATi_3O_7 and AO+ATi_2O_5 under high pressure. Especially, the phase assemblage of AO+ATi_3O_7 is denser than AO+TiO_2 cotunnite that often predicted as terminal state for ATiO_3 at high pressure. The result of this study will be important for predicting the silicate mineral assemblage in the deep interior of giant planets.
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