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.
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页码：735 / 740
页数：5
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