Nomenclature
CAS number: 1344-57-6
Uranous oxide; black uranium oxide.
O
2U; mol wt 270.03.
O 11.85%, U 88.15%.
UO
2.
Description and 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.Use
Nuclear fuel.