Aluminium Fluoride, Formula, Chemical Properties, Preparation, Uses

Aluminium Fluoride

Aluminium fluoride is an inorganic compounds and naturally occurred in the oskarssonite and rosenbergite. At 700C the hydrogen fluoride is treated with the alumina or aluminium oxide to produce the aluminium fluoride. The sublimation process is taken at the certain temperatures at 1272 degrees. So this chemical compound is highly stable. The systematic IUPAC name is known as aluminium fluoride. The chemical or molecular formula of aluminium fluoride is AlF3. The other name is called as aluminium trifluoride.

Structural Formula

This is the structural formula of the aluminium fluoride:

Aluminium Fluoride

Chemical Formula

The chemical formula of the aluminium fluoride is AlF3.

Preparation Method

When the alumina is reacted with the hydrogen fluoride and it produces the aluminium fluoride. In another method it is thermally decomposed the ammonium hexafluroaluminate. This acid is also used to make the aluminium fluoride. It has been also used as a precursor to zeolite. It exists as a trigonal molecules.

Learn More:   Barium Hydroxide, Formula, Chemical Properties, Preparation, Uses

H2SiF6 + Al2O3 + 3H2O → 2AlF3 + SiO2 + 4H2O

Physical Properties

Melting point 1291C
Boiling point 255C
Molecular weight 83.977g/mol
Density 3.10g/cm3
Solubility in water Soluble
Refractive index 1.3767
Crystal structure Rhombohedral
Magnetic susceptibility -13.4×10-6cm3/mol
Appearance White crystalline solid odorless

Chemical Properties

Aluminium fluoride has a high melting point and low boiling point. It is soluble in water. The refractive index for the aluminium fluoride is balanced. It looks like a white crystalline solid odorless. It has no taste. It contains the rhombohedral structure.


Aluminium fluoride is used as a catalyst in organic compounds. It is used in low index optical thin film. It is widely used in fermentation process for wine and beer industries. Aluminium fluoride is used in additive for the production of aluminium by electrolysis.


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