Actinium(III) fluoride
Crystal structure
| |
Names | |
---|---|
Other names
Actinium(III) fluoride
Actinium trifluoride | |
Identifiers | |
3D model (
JSmol ) |
|
PubChem CID
|
|
| |
| |
Properties | |
AcF3 | |
Molar mass | 284 g/mol[1] |
Appearance | white, crystalline solid |
Density | 7.88 g/cm3[1] |
Structure | |
Rhombohedral, hR24
| |
P3c1, No. 165[2] | |
a = 0.741 nm, c = 0.755 nm
| |
Lattice volume (V)
|
0.35902 |
Formula units (Z)
|
6 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|
Actinium(III) fluoride (AcF3) is an inorganic compound, a salt of actinium and fluorine.
Synthesis
Actinium fluoride can be prepared in solution or by a solid-state reaction. In the first method, actinium hydroxide is treated with hydrofluoric acid and the product precipitates:[3]
In the solid-state reaction, actinium metal is treated with hydrogen fluoride gas at 700 °C in a platinum crucible.[4][5]
Properties
Actinium fluoride is a white solid that reacts with ammonia at 900–1000 °C to yield an actinium oxyfluoride:
While lanthanum oxyfluoride is easily formed by heating
lanthanum fluoride in air, a similar treatment merely melts actinium fluoride and does not yield AcOF.[4][5]
References
- ^ ISBN 1-4398-5511-0.
- .
- ^
Haire, Richard G. (2006). "Actinium". In Morss; Edelstein, Norman M.; Fuger, Jean (eds.). The Chemistry of the Actinide and Transactinide Elements (3rd ed.). Dordrecht, The Netherlands: ISBN 1-4020-3555-1.
- ^ .
- ^ ISBN 0-7923-1018-7. pp. 87–88