2010 Fiscal Year Final Research Report

Phase behavior of ABO3-type compound under ultra high pressure

Research Project

Project/Area Number	22840017
Research Category	Grant-in-Aid for Research Activity Start-up
Allocation Type	Single-year Grants
Research Field	Petrology/Mineralogy/Science of ore deposit
Research Institution	The University of Tokyo
Principal Investigator	HAMANE Daisuke The University of Tokyo, 物性研究所, 特任専門職員 (20579073)
Project Period (FY)	2010
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
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.

(4 results)