P-V-T equation of state of periclase from synchrotron radiation measurements
P-V-T equation of state of periclase from synchrotron radiation measurements
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DOI：
10.1029/1999jb900364
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发表时间：
2000-02-10
影响因子：
3.9
通讯作者：
Hausermann, D
中科院分区：
文献类型：
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作者：
Dewaele, A;Fiquet, G;Hausermann, D
在压力为53 GPa、温度为2500 K的激光加热金刚石对顶砧装置中，用单色X射线衍射法测量了方镁石（MgO）的体积。X射线源是欧洲同步辐射设施（法国格勒诺布尔）的同步辐射。除了激光加热之外，使用氩气作为压力传递介质在电池组件中提供了准流体静力学条件。为了考虑热压效应;使用内部压力校准物（铂）测量压力。通过对实验P-V-T数据的分析，得到了K-0 = 3.94 +/-0.2（当K-0固定为0时）：在室温，KS，161 GPa下（Birch-Murnaghan方程α（P = 0，T）=（3.0 + 0.0012 T）× 10（-5）K-1;高温下，（偏导数K-T/偏导数T）p = -0.022（3）GPa K-1。准谐波德拜模型似乎正确地描述了在实验误差范围内的高压下体积的温度依赖性，具有以下参数：θ（D 0）= 800 K，gamma（0）= 1.45（环境条件下的Gruneisen参数），q = 0.8 +/- 0.5。
The volume of periclase (MgO) has been measured by monochromatic X-ray diffraction in a laser-heated diamond anvil cell up to a pressure of 53 GPa and a temperature of 2500 K. The X-ray source was synchrotron radiation at the European Synchrotron Radiation Facility (Grenoble, France). In addition to laser heating, the use of argon as a pressure transmitting medium provided quasi-hydrostatic conditions in the cell assembly. In order to take thermal pressure effect into account; pressure was measured using an internal pressure calibrant (platinum). By analysis of the experimental P-V-T data set the following parameters K-0(') = 3.94 +/- 0.2 when K-0 is fixed to of state);were obtained: at ambient temperature, KS, 161 GPa (with a Birch-Murnaghan equation alpha(P = 0, T) = (3.0 + 0.0012 T) x 10(-5) K-1; under,high temperature, (partial derivative K-T/partial derivative T)p = -0.022(3) GPa K-1. The quasi-harmonic Debye model appears to describe correctly the temperature dependence of the volume at high pressure within experimental errors, with the following parameters: theta(D0) = 800 K, gamma(0) = 1.45 (Gruneisen parameter under ambient conditions), and q = 0.8 +/- 0.5.