In situ observation of a garnet/perovskite transition in CaGeO3

被引：0

作者：

Shigeaki Ono

Takumi Kikegawa

Yuji Higo

机构：

[1] Japan Agency for Marine-Earth Science and Technology,Institute for Research on Earth Evolution

[2] University of Tokyo,Earthquake Research Institute

[3] High Energy Acceleration Research Organization,undefined

[4] Japan Synchrotron Radiation Research Institute,undefined

来源：

Physics and Chemistry of Minerals | 2011年 / 38卷

关键词：

Calcium germinate; Phase transition; Garnet; Perovskite;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

We used an in situ measurement method to investigate the phase transition of CaGeO3 polymorphs under high pressures and temperatures. A multi-anvil high-pressure apparatus combined with intense synchrotron X-ray radiation was used. The transition boundary between a garnet and a perovskite phase at T = 900–1,650 K and P = 3–8 GPa was determined as occurring at P (GPa) = 9.0−0.0023 × T (K). The transition pressure determined in our study is in general agreement with that observed in previous high-pressure experiments. The slope, dP/dT, of the transition determined in our study is consistent with that calculated from calorimetry data.

引用

页码：735 / 740

页数：5

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