Californium(III) oxide
| Names | |
|---|---|
| Other names
Californium sesquioxide, dicalifornium trioxide
| |
| Identifiers | |
3D model (JSmol)
|
|
| |
| |
| Properties | |
| Cf2O3 | |
| Molar mass | 550 g·mol−1 |
| Appearance | yellow-green solid |
| Density | g/cm3 |
| Melting point | 1,750 °C (3,180 °F; 2,020 K) |
| insoluble | |
| Structure | |
| orthorhombic | |
| Related compounds | |
Related compounds
|
Californium dioxide |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards
|
radioactive |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
| |
Californium(III) oxide is a binary inorganic compound of californium and oxygen with the formula Cf
2O
3.[1] It is one of the first obtained solid compounds of californium, synthesized in 1958.
Synthesis
[edit]The compound can be prepared by burning ionite in air, on which ions of trivalent californium are sorbed, at a temperature of 1400 °C. It can also be obtained by β-decay of berkelium(III) oxide.[citation needed]
Physical properties
[edit]Californium(III) oxide forms a yellow-green solid with a melting point of 1750 °C and exists in three modifications.[2] The body-centered cubic modification forms a crystal lattice with a = 1083.9 ± 0.4 pm. The transition temperature between body-centered cubic and monoclinic structures is about 1400 °C.[3][4]
It is insoluble in water.[5]
References
[edit]- ^ Morss, Lester R.; Fuger, J.; Goffart, J.; Edelstein, N.; Shalimoff, G. V. (1 January 1987). "Enthalpy of formation and magnetic susceptibility of californium sesquioxide, Cf2O3". Journal of the Less Common Metals. 127: 251–257. doi:10.1016/0022-5088(87)90385-7. ISSN 0022-5088. Retrieved 10 April 2023.
- ^ Macintyre, Jane E. (23 July 1992). Dictionary of Inorganic Compounds. CRC Press. p. 2826. ISBN 978-0-412-30120-9. Retrieved 10 April 2023.
- ^ Copeland, J. C.; Cunningham, B. B. (1 March 1969). "Crystallography of the compounds of californium—II crystal structure and lattice parameters of californium oxychloride and californium sesquioxide". Journal of Inorganic and Nuclear Chemistry. 31 (3): 733–740. doi:10.1016/0022-1902(69)80020-5. ISSN 0022-1902. Retrieved 10 April 2023.
- ^ Green, J. L.; Cunningham, B. B. (1 September 1967). "Crystallography of the compounds of californium. I. Crystal structure and lattice parameters of californium sesquioxide and californium trichloride". Inorganic and Nuclear Chemistry Letters. 3 (9): 343–349. doi:10.1016/0020-1650(67)80040-0. ISSN 0020-1650. Retrieved 10 April 2023.
- ^ Schweitzer, George K.; Pesterfield, Lester L. (14 January 2010). The Aqueous Chemistry of the Elements. Oxford University Press. p. 406. ISBN 978-0-19-539335-4. Retrieved 11 April 2023.
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