Title: Uranium Dioxide
CAS Registry Number: 1344-57-6
Additional Names: Uranous oxide; black uranium oxide
Molecular Formula: O2U
Molecular Weight: 270.03
Percent Composition: O 11.85%, U 88.15%
Line Formula: UO2
Literature References: Occurs in nature as the minerals uraninite or pitchblende. Review of uranium oxides: Keller in Comprehensive Inorganic Chemistry vol. 5, J. C. Bailar, Jr. et al., Eds. (Pergamon Press, Oxford, 1973) pp 224-233.
Properties: Brown to black powder, or cubic crystals. d 10.97. mp 2865°. When obtained by heating the urano-uranic oxide or the oxalate in hydrogen, it is brown or copper-red in color and is pyrophoric. Insol in water, dil acids; sol in concd acids.
Melting point: mp 2865°
Density: d 10.97
Use: Nuclear fuel. |