Phase Relations and Pressure-Volume-Temperature Equation of State of Galena
Phase Relations and Pressure-Volume-Temperature Equation of State of Galena
复制标题
DOI：
10.1088/0256-307x/27/8/086401
复制
发表时间：
2010-07
影响因子：
3.5
通讯作者：
Fang Dawei;Wenge Zhou;Wei Shuyi;Liu Jing;Yanchuan Li;Jiang Sheng;Hongsen Xie
中科院分区：
文献类型：
--
作者：
Fang Dawei;Wenge Zhou;Wei Shuyi;Liu Jing;Yanchuan Li;Jiang Sheng;Hongsen Xie
采用金刚石对顶砧电阻加热和同步辐射原位观测的方法，研究了方铅矿（PbS）在高温高压下的相关系和压力-体积关系。从NaCl型到TlI型的相变发生在约2.4GPa。拟合高温三阶Birch-Murnaghan状态方程得到TlI型方铅矿的等温体积模量K 0 = 37（3）GPa，其压力导数K '0 = 3.6（3），体积模量的温度导数（δK/δT）P = −0.022（9）GPaK−1，热膨胀系数α0 = 2.2（5）× 10−5 K−1。TlI型沿沿着a、B和c方向的线性压缩系数β具有弹性各向异性（βa = 3.4 × 10−3 GPa−1，βB = 1.4 × 10−4 GPa−1，βc = 1.6 × 10−3 GPa−1）。首次得到了铊型方铅矿的体积模量（δK/δT）P和热膨胀系数α0的温度导数。
The phase relations and pressure volume dependences of galena (PbS) under high pressure and high temperature are investigated by means of in situ observation using resistance heating in a diamond anvil cell and synchrotron radiation. The phase transition from NaCl type to TlI type takes place at approximately 2.4 GPa. A fit to the high temperature third-order Birch–Murnaghan equation of state yields an isothermal bulk modulus K0 = 37(3) GPa, and its pressure derivative K'0 = 3.6(3), the temperature derivative of the bulk modulus (δK/δT)P = −0.022(9) GPaK−1, and the thermal expansion coefficient α0 = 2.2(5) × 10−5 K−1 for TlI-type galena. The linear compressibilities β along a, b and c directions of TlI type is elastically anisotropic (βa = 3.4 × 10−3 GPa−1, βb = 1.4 × 10−4 GPa−1 and βc = 1.6 × 10−3 GPa−1). We obtain the temperature derivative of the bulk modulus (δK/δT)P and thermal expansion coefficient α0 for TlI-type galena for the first time.