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.

view along the a axis
view along the c axis
Ga coordination
F coordination
Gallium(III) fluoride
Names
Other names
gallium trifluoride
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.029.094
UNII
Properties
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)
0.0002 g/100 mL
Structure
Rhombohedral, hR24
R-3c, No. 167
Hazards
not listed
NFPA 704 (fire diamond)
Flammability code 0: Will not burn. E.g. waterHealth code 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasReactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
0
3
0
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

References
  1. Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
  2. 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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