The compression behavior of a natural scorodite has been investigated to about 8.21 GPa at 300 K for the fist time using in situ angle-dispersive X-ray diffraction and a diamond anvil cell at beamline X17C, 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 for the first time. The values of V-0, K-0, and K'(0) refined with a third-order Birch-Murnaghan equation of state are V-0 = 934.2 +/- 0.3 angstrom(3), K-0 = 61.8 +/- 2.5 GPa, and K'(0)= 6.6 +/- 0.9. Furthermore, we confirm that the linear compressibilities (beta) along a, b and c directions of scorodite is elastically anisotropic.

Publication name	HIGH TEMPERATURES-HIGH PRESSURES  Volume: 42   Issue: 3   Pages: 203-209   Published: 2013
Author(s)	Fan, Dawei; Ma, Maining; Wei, Shuyi; Li, BaoSheng; Chen, Zhiqiang; Xie,Hongsen
Corresponding author	FAN Dawei  fandawei@vip.gyig.ac.cn   Chinese Acad Sci, Inst Geochem, Study Earths Interior, Lab High Temp & High Pressure, Guiyang 550002, Peoples R China.

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