Bulk moduli and high-pressure phases of the uranium rocksalt structure compounds-I. The monochalcogenides
- 1 October 1989
- journal article
- research article
- Published by Taylor & Francis in High Pressure Research
- Vol. 1 (4) , 235-251
- https://doi.org/10.1080/08957958908222854
Abstract
The high-pressure crystal structures of the compounds UX, where X = S, Se and Te, have been 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 has been 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.Keywords
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