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Abstract

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);PHYSICS LABORATORY, UNIVERSITY OF COPENHAGEN (DK);JRC KARLSRUHE ESTAB. (DE);LABORATORIUM FUER FESTKOERPERPHYSIK, ZUERICH (CH);STAUN OLSEN J, LABORATORY OF APPLIED PHYSICS, UNIVERSITY OF DENMARK, LYNGBY (DK);PHYSICS LABORATORY, UNIVERSITY OF COPENHAGEN (DK);JRC KARLSRUHE ESTAB. (DE);LABORATORIUM FUER FESTKOERPERPHYSIK, ZUERICH (CH);BENEDICT U, LABORATORY OF APPLIED PHYSICS, UNIVERSITY OF DENMARK, LYNGBY (DK);PHYSICS LABORATORY, UNIVERSITY OF COPENHAGEN (DK);JRC KARLSRUHE ESTAB. (DE);LABORATORIUM FUER FESTKOERPERPHYSIK, ZUERICH (CH);DABOS S, LABORATORY OF APPLIED PHYSICS, UNIVERSITY OF DENMARK, LYNGBY (DK);PHYSICS LABORATORY, UNIVERSITY OF COPENHAGEN (DK);JRC KARLSRUHE ESTAB. (DE);LABORATORIUM FUER FESTKOERPERPHYSIK, ZUERICH (CH);VOGT O LABORATORY OF APPLIED PHYSICS, UNIVERSITY OF DENMARK, LYNGBY (DK), LABORATORY OF APPLIED PHYSICS, UNIVERSITY OF DENMARK, LYNGBY (DK);PHYSICS LABORATORY, UNIVERSITY OF COPENHAGEN (DK);JRC KARLSRUHE ESTAB. (DE);LABORATORIUM FUER FESTKOERPERPHYSIK, ZUERICH (CH);PHYSICS LABORATORY, UNIVERSITY OF COPENHAGEN (DK), LABORATORY OF APPLIED PHYSICS, UNIVERSITY OF DENMARK, LYNGBY (DK);PHYSICS LABORATORY, UNIVERSITY OF COPENHAGEN (DK);JRC KARLSRUHE ESTAB. (DE);LABORATORIUM FUER FESTKOERPERPHYSIK, ZUERICH (CH);JRC KARLSRUHE ESTAB. (DE), LABORATORY OF APPLIED PHYSICS, UNIVERSITY OF DENMARK, LYNGBY (DK);PHYSICS LABORATORY, UNIVERSITY OF COPENHAGEN (DK);JRC KARLSRUHE ESTAB. (DE);LABORATORIUM FUER FESTKOERPERPHYSIK, ZUERICH (CH);LABORATORIUM FUER FESTKOERPERPHYSIK, ZUERICH (CH), LABORATORY OF APPLIED PHYSICS, UNIVERSITY OF DENMARK, LYNGBY (DK);PHYSICS LABORATORY, UNIVERSITY OF COPENHAGEN (DK);JRC KARLSRUHE ESTAB. (DE);LABORATORIUM FUER FESTKOERPERPHYSIK, ZUERICH (CH)
Bibliographic Reference: ARTICLE: HIGH PRESSURE RESEARCH, VOL. 1 (1989) PP. 235-251
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