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Uranium borides can be described in terms of bidimensional networks of boron for UB(2) and of tridimensional networks of boron for UB(4) and UB(12). In these systems the boron atoms are strongly bonded together, providing their high stability. These compounds have never been examined under pressure. Obtaining information about their stability under pressure, their compressibility and possible pressure induced phase transitions was the object of this study. X-ray diffraction analysis was performed on uranium borides under pressure. Their crystalline structures remain stable up to 50 GPa and the mean values of B(0) and B(0)' are 225 GPa and 2.6 for UB(2), 181 GPa and 4.8 for UB(4), and 249 GPa and 3.4 for UB(12) respectively.

Additional information

Authors: DANCAUSSE J-P ET AL., JRC Karlsruhe (DE);GERWARD L, Technical University of Denmark, Lyngby (DK);OLSEN S S, University of Copenhagen, Physics Laboratory (DK);HULLIGER F, ETH Zürich, Laboratorium für Festkörperphysik (CH)
Bibliographic Reference: Article: Journal of Alloys and Compounds, Vol. 189 (1992) pp. 205-208
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