| Names | |
|---|---|
| IUPAC name Neptunium(V) fluoride | |
| Other names Neptunium pentafluoride | |
| Identifiers | |
3D model (JSmol) | |
| |
| |
| Properties | |
| NpF5 | |
| Molar mass | 332 g/mol |
| Appearance | Bluish-white solid[1] |
| Melting point | 318 °C[1] (dec.) |
| Structure | |
| Tetragonal,tI12[1] | |
| I4/m, No. 87[2] | |
a = 0.65358 nm,c = 0.44562 nm | |
Lattice volume (V) | 0.1904 nm3 |
Formula units (Z) | 2 |
| Thermochemistry | |
| 133 ± 8 J/mol·K[1] | |
Std molar entropy(S⦵298) | 200 ± 15 J/mol·K[1] |
Std enthalpy of formation(ΔfH⦵298) | −1941 ± 25 kJ/mol[1] |
Gibbs free energy(ΔfG⦵) | −1834 ± 25 kJ/mol[1] |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Neptunium(V) fluoride orneptunium pentafluoride is achemical compound ofneptunium andfluorine with theformula NpF5.
Neptunium(V) fluoride can be prepared by reactingneptunium(VI) fluoride withiodine:[1]
From the equation above,iodine pentafluoride is a byproduct.
Neptunium(V) fluoride thermally decomposes at 318 °C to produceneptunium(IV) fluoride andneptunium(VI) fluoride. Contrary touranium(V) fluoride, neptunium(V) fluoride does not react withboron trichloride, but it reacts withlithium fluoride in anhydrousHF to produce LiNpF6.[1]
 | Thismetal halide related article is astub. You can help Wikipedia byexpanding it. |
