Gallium(III) fluoride

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Gallium(III) fluoride
Gallium(III) fluoride
FeF3structure.jpg
Identifiers
CAS number 7783-51-9 N
PubChem 82211
ChemSpider 74191 YesY
Jmol-3D images Image 1
Properties
Molecular formula GaF3
Molar mass 126.718 g/mol
Appearance white powder
Density 4.47 g/cm3
Melting point 800 °C
Boiling point 1000°C
Solubility in water 0.0002 g/100 mL
Structure
Crystal structure Rhombohedral, hR24
Space group R-3c, No. 167
Hazards
EU classification not listed
NFPA 704
Flammability code 0: Will not burn. E.g., water Health code 3: Short exposure could cause serious temporary or residual injury. E.g., chlorine gas Reactivity code 2: Undergoes violent chemical change at elevated temperatures and pressures, reacts violently with water, or may form explosive mixtures with water. E.g., phosphorus Special hazards (white): no codeNFPA 704 four-colored diamond
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 N (verify) (what is: YesY/N?)
Infobox references

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.

Gallium-trifluoride-xtal-2004-A-3D-balls.png
Gallium-trifluoride-xtal-2004-C-3D-balls.png
Gallium-trifluoride-xtal-2004-Ga-coordination-3D-balls.png
Gallium-trifluoride-xtal-2004-F-coordination-3D-balls.png
view along the an axis
view along the c axis
Ga coordination
F coordination

References[edit]

  1. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 0080379419. 
  2. ^ a b c Anthony John Downs, (1993), Chemistry of Aluminium, Gallium, Indium, and Thallium, Springer, ISBN 978-0-7514-0103-5

Further reading[edit]

  • 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. doi:10.1016/0040-6090(89)90140-5.