On the californium oxide system

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Abstract

Californium dioxide was prepared by oxidation with high pressure molecular oxygen and by atomic oxygen. The CfO2 has a fcc structure with an expansion corrected lattice parameter of 5·310 ± 0·002 Å. Several areas of oxide stability in the range CfOχ(2·00 > χ > 1·50) are reported and these phases have a rhombohedral structure. The phase transition temperature between the body-centered cubic Cf2O3 and monoclinic Cf2O3 is ∼ 1400°C.

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    Research sponsored by the U.S. Atomic Energy Commission under contract with the Union Carbide Corporation.

    Oak Ridge Graduate Fellow from the University of Tennessee (Knoxville) under appointment from the Oak Ridge Associated Universities. Present address: Chemistry Department, Bronx Community College, Bronx, N.Y. 10468, U.S.A.

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