[Zurück]

T. Le Bihan, A. Bombardi, M. Idiri, S. Heathman, A. Lindbaum:
"High-pressure x-ray diffraction study of U_xLa_1-xS";
Journal of Physics: Condensed Matter, 14 (2002), S. 10595 - 10600.

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, B0 _ 90 GPa whereas for x _ 0.60, B0 ¡« 100 GPa) and in the transition pressure (¡«30 GPa for low-uraniumcontent compounds and from 45 to 80 GPa for high concentrations).