Berkelium(IV) oxide
Berkelium(IV) oxide.jpg
Other names
  • Berkelium dioxide
3D model (JSmol)
  • [O-2].[O-2].[Bk+4]
Molar mass 278.9988 g/mol
Appearance Brown solid
a = 5.334 A°, b = 5.334 A°, c = 5.334 A°
Related compounds
Other anions
Berkelium(IV) sulfide
Other cations
Americium(IV) oxide
Curium(IV) oxide
Californium(IV) oxide
Related compounds
Berkelium(III) oxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Berkelium(IV) oxide, also known as berkelium dioxide, is a chemical compound with the formula BkO2. This compound slowly decays to californium(IV) oxide.[2] It can be converted to berkelium(III) oxide by hydrogen reduction at 600 °C.[3]

2BkO2 + H2 → Bk2O3 + H2O


Berkelium(IV) oxide is produced by burning berkelium metal in air at 1200 °C. It can also be produced by reacting berkelium(III) oxide with oxygen at 600 °C.[3]


  1. ^ Baybarz, R. D. (1968). "The berkelium oxide system". Journal of Inorganic and Nuclear Chemistry. 30 (7): 1769–1773. doi:10.1016/0022-1902(68)80352-5.
  2. ^ U.S Atomic Energy Commission. Division of Plans and Reports (1972). Fundamental Nuclear Energy Research. the University of Michigan. p. 100.
  3. ^ a b Peterson, J. (1967). "Crystal structures and lattice parameters of the compounds of berkelium I. Berkelium dioxide and cubic berkelium sesquioxide". Inorganic and Nuclear Chemistry Letters. 3 (9): 327–336. doi:10.1016/0020-1650(67)80037-0.