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. GaF3 can be prepared by reacting F2 or HF with Ga2O3 or by thermal decomposition of (NH4)3GaF6. GaF3 is virtually insoluble in water. Solutions of GaF3 in HF can be evaporated to form the trihydrate, GaF3·3H2O, which on heating gives a hydrated form of GaF2(OH). Gallium(III) fluoride reacts with mineral acids to form hydrofluoric acid.

view along the a axisview along the c axisGa coordinationF coordination
Gallium(III) fluoride
Names
Other names
gallium trifluoride
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.029.094
EC Number
  • 232-004-5
PubChem CID
UNII
  • InChI=1S/3FH.Ga/h3*1H;/q;;;+3/p-3 Y
    Key: WXXZSFJVAMRMPV-UHFFFAOYSA-K Y
  • InChI=1/3FH.Ga/h3*1H;/q;;;+3/p-3
    Key: WXXZSFJVAMRMPV-DFZHHIFOAM
SMILES
  • F[Ga](F)F
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
Space group
R-3c, No. 167
Hazards
GHS labelling:
Warning
H302, H312, H332
P261, P264, P270, P271, P280, P301+P312, P302+P352, P304+P312, P304+P340, P312, P322, P330, P363, P501
NFPA 704 (fire diamond)
3
0
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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Infobox references
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