Chemistry:Neptunium(III) fluoride
From HandWiki
| Names | |
|---|---|
| IUPAC name
Neptunium(III) fluoride
| |
| Other names
Neptunium trifluoride
| |
| Identifiers | |
3D model (JSmol)
|
|
PubChem CID
|
|
| |
| |
| Properties | |
| NpF3 | |
| Molar mass | 294 g/mol |
| Appearance | Purple solid[1] |
| Structure | |
| Trigonal, hP8[1] | |
| P63/mmc, No. 194[2] | |
a = 0.7129 nm, c = 0.7288 nm
| |
Lattice volume (V)
|
0.32077 nm3 |
Formula units (Z)
|
6 |
| Thermochemistry | |
Heat capacity (C)
|
94 ± 3 J/mol·K[1] |
Std molar
entropy (S |
131 ± 3 J/mol·K[1] |
Std enthalpy of
formation (ΔfH⦵298) |
−1529 ± 8 kJ/mol[1] |
Gibbs free energy (ΔfG˚)
|
-1461 ± 8 kJ/mol[1] |
| Related compounds | |
Other anions
|
Neptunium(III) chloride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Neptunium(III) fluoride or neptunium trifluoride is a salt of neptunium and fluorine with the formula NpF3.
Synthesis
Neptunium(III) fluoride can be prepared by reacting neptunium dioxide with a gas mixture of hydrogen and hydrogen fluoride at 500 °C:[1]
- [math]\displaystyle{ \mathrm{2\ NpO_2\ +\ H_2\ +\ 6\ HF\ \longrightarrow \ 2\ NpF_3\ +\ 4\ H_2O} }[/math]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Haire, Richard G. (2006). "Neptunium". in Morss; Edelstein, Norman M.; Fuger, Jean. The Chemistry of the Actinide and Transactinide Elements (3rd ed.). Dordrecht, The Netherlands: Springer Science+Business Media. pp. 730–736. doi:10.1007/1-4020-3598-5_9. ISBN 1-4020-3555-1.
- ↑ Zachariasen, W. H. (1949). "Crystal chemical studies of the 5f-series of elements. XII. New compounds representing known structure types". Acta Crystallographica 2 (6): 388–390. doi:10.1107/S0365110X49001016.
 |  |
