Californium(IV) oxide

Californium(IV) oxide is a binary inorganic compound of californium and oxygen with the formula CfO
₂.^[1]

Californium(IV) oxide

Names
Other names Californium dioxide
Identifiers
CAS Number	12015-10-0
3D model (JSmol)	Interactive image
ChemSpider	64885445
ECHA InfoCard	100.031.448
EC Number	234-606-3
InChI InChI=1S/Cf.2O/q+4;2*-2 Key: LCCVNIITEFXFMU-UHFFFAOYSA-N
SMILES [Cf+4].[O-2].[O-2]
Properties
Chemical formula	CfO2
Molar mass	283 g·mol−1
Appearance	black-brown solid
Density	g/cm3
Solubility in water	insoluble
Structure
Crystal structure	cubic
Related compounds
Related compounds	Berkelium dioxide, dicalifornium trioxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Synthesis

Californium dioxide is produced by oxidizing californium with molecular and atomic oxygen at high pressure.^[2]

Physical properties

Californium(IV) oxide is a black-brown solid that has a cubic fluorite crystal structure with a lattice parameter, the distance between unit cells in the crystal, of 531.0 ± 0.2 pm. Crystals of californium(III) oxide normally have a body-centered cubic symmetry. They convert to a monoclinic form upon heating to about 1400 °C and melt at 1750 °C.^[3]

References

1. "WebElements Periodic Table » Californium » californium dioxide". webelements.com. Retrieved 11 April 2023.
2. Haire, Richard G. (2006). "Californium". The Chemistry of the Actinide and Transactinide Elements. Springer Netherlands. pp. 1499–1576. doi:10.1007/1-4020-3598-5_11. ISBN 978-1-4020-3598-2. Retrieved 11 April 2023.
3. Baybarz, R. D.; Haire, R. G.; Fahey, J. A. (1 February 1972). "On the californium oxide system". Journal of Inorganic and Nuclear Chemistry. 34 (2): 557–565. doi:10.1016/0022-1902(72)80435-4. ISSN 0022-1902. Retrieved 11 April 2023.