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天然黄铜矿原位高温高压X射线衍射研究

DOI: 10.11858/gywlxb.2013.06.006, PP. 828-832

Keywords: 状态方程,天然黄铜矿,高温高压,同步辐射

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Abstract:

在金刚石压腔高压装置(DAC)上,采用外加温实验技术和同步辐射角度色散X射线衍射技术,在最高温度628K和最高压力32.0GPa条件下,对天然黄铜矿进行了相变及热状态方程研究。实验样品在约6.0GPa条件下发生了Chalcopyrite-Rocksalt相变。获得了天然黄铜矿的高温高压实验数据,并根据二阶Birch-Murnaghan状态方程,对所获得的实验数据进行了状态方程拟合,首次获得了天然黄铜矿Rocksalt相的体弹模量K0=109(3)GPa,体弹模量的温度导数(dK/dT)p=-0.033(4)GPa·K-1和热膨胀系数α0=2.0(2)×10-5K-1。

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