Neptunium(III) fluoride
Chemical compound
From Wikipedia, the free encyclopedia
Neptunium(III) fluoride or neptunium trifluoride is a salt of neptunium and fluorine with the formula NpF3.
| Names | |
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| IUPAC name
Neptunium(III) fluoride | |
| Other names
Neptunium trifluoride | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
PubChem CID |
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CompTox Dashboard (EPA) |
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| 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⦵298) |
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).
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Synthesis
Neptunium(III) fluoride can be prepared by reacting neptunium dioxide with a gas mixture of hydrogen and hydrogen fluoride at 500 °C:[1]
- 2 NpO2 + H2 + 6 HF → 2 NpF3 + 4 H2O
