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The diamond anvil technique for generation of pressure is briefly introduced. Recent studies of the behaviour of neptunium and plutonium compounds of the B1 (NaCl) and C1 (CaF(2)) type under high pressure are reviewed. Most of the B1 type compounds have the B2 (CsCl) type as a high pressure structure, but tetragonal and rhombohedral high-pressure phases are observed as well. Orthorhombic high-pressure phases exist for the dioxides. The bulk moduli are determined for all compounds studied. PuO(2) is found to be less compressible than dioxides of lighter actinides.

Additional information

Authors: BENEDICT U, JRC Karlsruhe (DE);HEATHMAN S ET AL., JRC Karlsruhe (DE);DABOS-SEIGNON S, Institut Curie, Section de Physique et Chimie, Paris (FR);GERING E, Robert Bosch GmbH, Bamberg (DE)
Bibliographic Reference: Paper presented: International Symposium Commemorating the 50th Anniversary of the Discovery of Neptunium and Plutonium, Washington D.C. (US), Aug. 26-31, 1990
Availability: Available from (1) as Paper EN 35862 ORA
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