Synchrotron X-ray diffraction study of phenacite at high pressure

Synchrotron X-ray diffraction study of phenacite at high pressure
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高压斜长石的同步辐射 X 射线衍射研究

DOI:
10.1088/1674-1137/36/2/014
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发表时间:
2012-02
期刊:
影响因子:
3.6
通讯作者:
Xie HS
Xie HS
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Fan DW;Ma MN;Wei SY;CHen ZY;Xie HS

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我们报告了使用原位角色散 X 射线衍射和布鲁克海文国家实验室国家同步加速器光源的金刚石砧室对 0 至 30.9 GPa 的天然斜铜矿的结果。在此压力范围内,没有观察到相变或歧化。确定了等温状态方程。用三阶Birch-Murnaghan状态方程精化后的V0、K0、K0值为V0=1116.1±1.23,K0=223±9GPa,K0=5.5±0.8。此外,我们证实了斜长石沿 a 和 c 方向的线性压缩率 (β) 是弹性各向同性的 (βa =1.50 × 10-3 和 βc =1.34 × 10-3 GPa-1)。因此,可以得出结论,斜长石在高压下的压缩性已被精确约束。
We report the results of a natural phenacite from 0 to 30.9 GPa using in situ angle-dispersive X-ray diffraction and a diamond anvil cell at the National Synchrotron Light Source, Brookhaven National Laboratory. Over this pressure range, no phase change or disproportionation has been observed. The isothermal equation of state was determined. The values of V0 , K0 , and K0 refined with a third-order Birch-Murnaghan equation of state are V0 =1116.1 ± 1.2 3 , K0 =223±9 GPa, and K 0 =5.5 ± 0.8. Furthermore, we confirm that the linear compressibilities (β) along a and c directions of phenacite are elastically isotropic (βa =1.50 × 10-3 and βc =1.34 × 10-3 GPa-1). Consequently, it can be concluded that the compressibility of phenacite under high pressures has been accurately constrained.
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