In situ observation of a garnet/perovskite transition in CaGeO3
In situ observation of a garnet/perovskite transition in CaGeO3
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DOI：
10.1007/s00269-011-0446-z
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发表时间：
2011-06
影响因子：
1.4
通讯作者：
S. Ono;T. Kikegawa;Y. Higo
中科院分区：
文献类型：
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作者：
S. Ono;T. Kikegawa;Y. Higo
我们使用原位测量方法研究了 CaGeO3 多晶型物在高压和高温下的相变。使用多砧高压装置与强同步加速器X射线辐射相结合。在 T= 900–1,650 K 和 P= 3–8 GPa 时石榴石和钙钛矿相之间的过渡边界被确定为发生在 P(GPa) = 9.0−0.0023 ×T(K) 处。我们研究中确定的转变压力与之前高压实验中观察到的结果基本一致。我们研究中确定的转变斜率 dP/dT 与根据量热数据计算的斜率一致。
We used an in situ measurement method to investigate the phase transition of CaGeO3polymorphs 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 atT= 900–1,650 K andP= 3–8 GPa was determined as occurring atP(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.