Gadolinium(III) fluoride
Chemical compound
From Wikipedia, the free encyclopedia
Gadolinium(III) fluoride is an inorganic compound with a chemical formula GdF3.
| Names | |
|---|---|
| IUPAC name
Gadolinium(III) fluoride | |
| Other names
Gadolinium trifluoride Gadolinium fluoride | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.033.958 |
| EC Number |
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PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| GdF3 | |
| Appearance | White crystalline powder |
| Density | 7.09 g/cm3 |
| Melting point | 1,372 °C (2,502 °F; 1,645 K) |
| insoluble | |
| Structure[1] | |
| orthorhombic | |
| Pnma | |
| Hazards | |
| GHS labelling: | |
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| Warning | |
| H315, H319, H335 | |
| NFPA 704 (fire diamond) | |
| Safety data sheet (SDS) | Safety Data Sheet |
| Related compounds | |
Other anions |
Gadolinium(III) chloride Gadolinium(III) bromide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Preparation
Gadolinium(III) fluoride can be prepared by heating gadolinium oxide and ammonium bifluoride. The reaction involves two steps:[2][3]
- Gd2O3 + 6 NH4HF2 → 2 NH4GdF4 + 4 NH4F + 3 H2O
- NH4GdF4 → GdF3 + NH3 + HF
Alternatively, reacting gadolinium chloride with hydrofluoric acid and adding hot water produces GdF3·xH2O (x=0.53). Anhydrous gadolinium(III) fluoride can then be produced by heating the hydrate with ammonium bifluoride; without the bifluoride, GdOF is formed instead.[4]
- GdCl3 + 3 HF + x H2O → GdF3·xH2O + 3 HCl
Uses
Gadolinium(III) fluoride is used to produce fluoride glasses.[5]