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Abstract

X-ray diffraction measurements under pressure have been performed on seven different compositions in the UxLa1-xS system (x = 0, 0.08, 0.40, 0.50, 0.60, 0.80, 1). All the compounds have the same structure (NaCl type) at ambient pressure, but show different behaviours under pressure. A transformation into the CsCl-type structure is only observed for x < 0.60. For x = 0.80 and 1, the high-pressure phase has yet to be determined. We also observe a difference in bulk modulus (for x < 0.50, B(0) < 90 GPa whereas for x >0.60, B(0) ~ 100 GPa) and in the transition pressure (~30 GPa for low-uranium-content compounds and from 45 to 80 GPa for high concentrations).

Additional information

Authors: LE BIHAN T, European Synchrotron Radiation Facility, Grenoble (FR);BOMBARDI A, DRFMC, Commissariat à l'Energie Atomique, Grenoble (FR);IDIRI M, European Commission, Joint Research Centre, Institute for Transuranium Elements, Karlsruhe (DE);HEATHMAN S, European Commission, Joint Research Centre, Institute for Transuranium Elements, Karlsruhe (DE);LINDBAUM A, European Commission, Joint Research Centre, Institute for Transuranium Elements, Karlsruhe (DE)
Bibliographic Reference: An article published in: Journal of Physics: Condensed Matter 14 (11 November 2002) 10595-10600
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://stacks.iop.org/0953-8984/14/10595
Record Number: 200316051 / Last updated on: 2003-03-13
Category: PUBLICATION
Original language: en
Available languages: en
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