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Powder diffraction analysis of cerium dioxide at high pressure

Published online by Cambridge University Press:  10 January 2013

L. Gerward  and
J. Staun Olsen
L. Gerward
Affiliation:
Physics Department, Building 307, Technical University of Denmark, DK-2800 Lyngby, Denmark
J. Staun Olsen
Affiliation:
Niels Bohr Institute, H. C. Oersted Laboratory, University of Copenhagen, DK-2100 Copenhagen, Denmark
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Abstract

CeO2 transforms to an orthorhombic PbCl2-type structure at a pressure of about 31 GPa. The phase transition is accompanied by a 9.8% volume contraction. The bulk modulus of the low-pressure fluorite-type structure is 236(4) GPa. Comparisons are made with the high-pressure behaviour of UO2 and ThO2.

Keywords

high pressureelastic propertiesphase transformation

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Type
Research Article
Information
Powder Diffraction , Volume 8 , Issue 2 , June 1993 , pp. 127 - 129
Copyright
Copyright © Cambridge University Press 1993

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