A high-pressure study of PbCO3 by XRD and Raman spectroscopy

被引：0

作者：

张玉峰 ^{[1
]}

刘景 ^{[1
]}

秦振兴 ^{[2
]}

林传龙 ^{[1
]}

熊伦 ^{[1
]}

李蕊 ^{[1
]}

白利刚 ^{[1
]}

机构：

[1] Institution of High Energy Physics,Chinese Academy of Sciences

[2] Department of Physics,South China University of Technology

来源：

Chinese Physics C | 2013年 / 03期

关键词：

XRD; Raman; phase transition; bulk modulus;

D O I：

暂无

中图分类号：

O572.211 [];

学科分类号：

070202 ;

摘要：

The pressure-induced phase transitions of PbCO3 are studied using synchrotron radiation in a diamond anvil cell at room temperature. The XRD measurement indicates that PbCO3 with an initial phase of aragonite-type structure undergoes two phase transitions at ～7.8GPa and ～15.7GPa respectively. The higher-pressure phase appearing at ～ 15.7GPa is stable up to 51.8GPa. The two phase transitions are further confirmed by Raman scattering up to 23.3GPa. During the decompression process, the high-pressure phases of PbCO3 are gradually recovered to the starting aragonite-type structure, but exhibit some hysteresis. The bulk modulus B0 of the aragonite-type structure is obtained to be 63±(3) GPa by fitting the volume-pressure data to the Birch-Murnaghan equation of states with B0 fixed to 4.

引用

页码：112 / 116

页数：5

共 16 条

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