 | You can helpexpand this article with text translated fromthe corresponding article in Czech. (January 2024)Click [show] for important translation instructions.
|
 Crystal structure | |
| Names | |
|---|---|
| IUPAC name Curium(III) fluoride | |
| Other names Curium trifluoride | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider |
|
| |
| |
| Properties | |
| CmF3 | |
| Appearance | Colorless solid[1] |
| Melting point | 1406 ± 20 °C;[1] |
| ~10 mg/L | |
| Structure | |
| Rhombohedral,hR24 | |
| P3c1, No. 165[2] | |
a = 0.7012 nm,c = 0.7198 nm | |
Lattice volume (V) | 0.30650 |
Formula units (Z) | 6 |
| Thermochemistry | |
Std molar entropy(S⦵298) | 121 J/mol·K[1] |
Std enthalpy of formation(ΔfH⦵298) | −1660 kJ/mol[1] |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Curium(III) fluoride orcurium trifluoride is thechemical compound composed ofcurium andfluorine with theformula CmF3.[3] It is a white, nearly insoluble salt that has the same crystal structure as LaF3. It precipitates as a hydrate when fluoride ions are added to a weakly acidic Cm(III) solution; alternatively it can be synthesized by reactinghydrofluoric acid with Cm(OH)3. The anhydrous form is then obtained by desiccation or by treatment withhydrogen fluoride gas.[1]
Curium fluoride can be prepared by in the reaction of curium with fluorine ions in an aqueous solution under weakly acidic conditions:
Another possible preparation is the reaction of curium hydroxide with hydrofluoric acid, which also produces a hydrate of curium fluoride.[4]
 | Thismetal halide related article is astub. You can help Wikipedia byexpanding it. |
