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High purity alpha plutonium was studied by X-ray diffraction in a diamond anvil cell up to 62 GPa. A structural phase transition occurs around 40 GPa. The high pressure structure was indexed in a hexagonal lattice of space group P6(3)/m, a = 537.77 pm, c = 445.51 pm at 62 GPa, Z = 8. The bulk modulus B(0) of alpha plutonium was determined as 43(2) GPa, with a pressure derivative B'(0) = 15(2).

Additional information

Authors: DABOS-SEIGNON S, Institut Curie, Paris (FR);DANCAUSSE J P, CEA, Bagnols-sur-Cèze (FR);GERING E, Robert Bosch GmbH, Bamberg (DE);HEATHMAN S, JRC Karlsruhe (DE);BENEDICT U, JRC Karlsruhe (DE)
Bibliographic Reference: Article: Journal of Alloys and Compounds, Vol. 190 (1993) pp. 237-242
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