Gallium(III) fluoride
Gallium(III) fluoride (GaF3) is a chemical compound. It is a white solid that melts under pressure above 1000 °C but sublimes around 950 °C. It has the FeF3 structure where the gallium atoms are 6-coordinate.[1] GaF3 can be prepared by reacting F2 or HF with Ga2O3 or by thermal decomposition of (NH4)3GaF6.[2] GaF3 is virtually insoluble in water.[2] Solutions of GaF3 in HF can be evaporated to form the trihydrate, GaF3·3H2O, which on heating gives a hydrated form of GaF2(OH).[2] Gallium(III) fluoride reacts with mineral acids to form hydrofluoric acid.
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| Names | |
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| Other names
gallium trifluoride | |
| Identifiers | |
CAS Number |
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3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.029.094 |
PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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InChI
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SMILES
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| Properties | |
Chemical formula |
GaF3 |
| Molar mass | 126.718 g/mol |
| Appearance | white powder |
| Density | 4.47 g/cm3 |
| Melting point | 800 °C (1,470 °F; 1,070 K) |
| Boiling point | 1,000 °C (1,830 °F; 1,270 K) |
Solubility in water |
0.0002 g/100 mL |
| Structure | |
Crystal structure |
Rhombohedral, hR24 |
Space group |
R-3c, No. 167 |
| Hazards | |
EU classification (DSD) (outdated) |
not listed |
| NFPA 704 (fire diamond) | 
0
3
0 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
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References
- Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
- Anthony John Downs, (1993), Chemistry of Aluminium, Gallium, Indium, and Thallium, Springer, ISBN 978-0-7514-0103-5
Further reading
- Barrière, A.S.; Couturier, G.; Gevers, G.; Guégan, H.; Seguelond, T.; Thabti, A.; Bertault, D. (1989). "Preparation and characterization of gallium(III) fluoride thin films". Thin Solid Films. 173 (2): 243. Bibcode:1989TSF...173..243B. doi:10.1016/0040-6090(89)90140-5.
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