In a hydrostatic pressure environment condition and in manual milling, respectively, investigations of PbWO4-III (P2(1) /n) have been performed by X-ray diffraction and Raman scattering techniques. Experiments found that PbWO4-III keeps its monoclinic structure under hydrostatic pressures with the sample's anisotropic compressibility up to 14.6 GPa, but transforms to PbWO4-I (I4(1) /a) in a grinding process. The stability and variability of PbWO4-III depending on the strain states were also explored by first-principles calculations of elasticity. Calculations show PbWO4-III has an anisotropic compressibility and a ductile nature with increasing pressure up to 15 GPa.

Publication name	PHYSICS AND CHEMISTRY OF MINERALS　Volume: 40　 Issue: 4　 Pages: 341-348　Published:APR 2013
Author(s)	Tan, Dayong; Xiao, Wansheng; Zhou, Wei; Chen, Ming; Zhou, Wenge; Xu, Jian
Corresponding author	XIAO Wansheng  wsxiao@gig.ac.cn  Chinese Acad Sci, Key Lab Mineral & Metallogeny, Guangzhou Inst Geochem, Guangzhou 510640, Guangdong, Peoples R China.
Author(s) from IGCAS	ZHOU Wei

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