Structural transition of BaF2 nanocrystals under high pressure
作者： Jing-Shu Wang , Chun-Li Ma , Hong-Yang Zhu , Xiao-Xin Wu , Dong-Mei Li
DOI: 10.1088/1674-1137/37/8/088001
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摘要: The structural transition of BaF2 nanocrystals is studied by in situ high pressure synchrotron radiation X-ray diffraction measurements up to about 21.2 GPa at ambient temperature. Two phase transformations were observed 5.8 and 14.4 GPa, the two phases are identified as orthorhombic (Pnma) hexagonal (P6(3)/mmc) Rietveld refinement. Upon decompression, alpha-PbCl2-type metastable retained when released. higher than that bulk BaF2. It proposed size effects found influence high-pressure behaviors surface energy plays a significant role stability.
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