BULK MODULI AND HIGH-PRESSURE PHASES OF THE URANIUM ROCKSALT STRUCTURE COMPOUNDS - I. THE MONOCHALCOGENIDES
The high-pressure crystal structures of the compounds UX, where X = S, Se and Te, are studied using X-ray diffraction in the pressure range up to about 60 GPa. A rhombohedral distortion is observed for US above 10 GPa. USe and UTe transform to the CsCl structure at about 20 GPa and 9 GPa, respectively. The latter transformations show a considerable hysteresis when releasing the pressure. The scaling behaviour of the bulk modulus is studied. It is shown that a log-log plot of the bulk modulus versus specific volume for the cubic phases gives a straight line with a slope near -2.
Bibliographic Reference: ARTICLE: HIGH PRESSURE RESEARCH, VOL. 1 (1989) PP. 235-251
Record Number: 1989128071300 / Last updated on: 1990-10-01
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