Phase boundary between perovskite and post-perovskite structures in MnGeO3 determined by in situ X-ray diffraction measurements using sintered diamond anvils
Phase boundary between perovskite and post-perovskite structures in MnGeO3 determined by in situ X-ray diffraction measurements using sintered diamond anvils
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DOI：
10.2138/am.2011.3499
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发表时间：
2011
影响因子：
3.1
通讯作者：
D. Yamazaki;E. Ito;T. Katsura;T. Yoshino;S. Zhai;H. Fukui;A. Shatskiy;Xinzhuan Guo;S. Shan;T. Okuchi;Y. Tange;Y. Higo;K. Funakoshi
中科院分区：
文献类型：
--
作者：
D. Yamazaki;E. Ito;T. Katsura;T. Yoshino;S. Zhai;H. Fukui;A. Shatskiy;Xinzhuan Guo;S. Shan;T. Okuchi;Y. Tange;Y. Higo;K. Funakoshi
摘要为了确定MnGeO_3中钙钛矿和后钙钛矿结构之间的相界，在57-68 GPa压力和1000-1900 K温度下，使用配备有烧结金刚石砧的Kawai型高压装置与同步辐射接口进行了原位X射线观测。根据Tsuchiya（2003）的金压力标度确定其相界为P（GPa）= 39.2 + 0.013T（K）。在本研究中测定的克拉珀龙斜率dP/dT为13（+12/-5）MPa/K，大于MgGeO_3和MgSiO_3。
Abstract To determine the phase boundary between the perovskite and post-perovskite structures in MnGeO3, in situ X-ray observations were carried out at pressures of 57-68 GPa and temperatures of 1000-1900 K using the Kawai-type high-pressure apparatus equipped with sintered diamond anvils interfaced with synchrotron radiation. The phase boundary was determined to be P (GPa) = 39.2 + 0.013T (K) based on Tsuchiya’s (2003) gold pressure scale. The Clapeyron slope, dP/dT, of 13(+12/-5) MPa/K, determined in the present study is larger that of MgGeO3 and MgSiO3.