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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.

Additional information

Authors: GERWARD L, Laboratory of Applied Physics, University of Denmark, Lyngby (DK);STAUN OLSEN J, Physics Laboratory, University of Copenhagen (DK);BENEDICT U, JRC Karlsruhe (DE);DABOS S, JRC Karlsruhe (DE);VOGT O, Laboratorium für Festkörperphysik, Zürich (CH)
Bibliographic Reference: Article: High Pressure Research, Vol. 1 (1989) pp. 235-251
Record Number: 199010746 / Last updated on: 1994-12-01
Original language: en
Available languages: en