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UC(2) was studied up to 50.1 GPa in 21 steps. Near 17.6 GPa, a structural transition occurred. The new phase remained stable under pressure up to the highest pressure reached and on pressure release down to approximately 5 GPa. Below this pressure value the low pressure structure reappeared. The d(hkl) values were deduced from the energy dispersive spectra and used in the calculation of both the lattice parameters and the relative volume V/V(0) variations. It was found that the mean of the isothermal bulk modulus and of its pressure derivative, determined by fitting the V/V(0) = f(p) data ((0) indicates ambient pressure) to several equations of state, is equal to 216 GPa and 2.2, respectively.

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Authors: DANCAUSSE J-P, JRC Karlsruhe (DE);HEATHMAN S, JRC Karlsruhe (DE);BENEDICT U, JRC Karlsruhe (DE);GERWARD L, Technical University of Denmark, Laboratory of Applied Physics, Lyngby (DK);STAUN OLSEN J, University of Copenhagen, Physics Laboratory (DK);HULLIGER F, ETH Zürich, Laboratorium für Festkörperphysik (CH)
Bibliographic Reference: Paper presented: 22. Journées des Actinides, Méribel (FR), April 22-25, 1992
Availability: Text not available
Record Number: 199211161 / Last updated on: 1994-11-29
Original language: en
Available languages: en