Title: Ferrous Fluoride

CAS Registry Number: 7789-28-8

Molecular Formula: F2Fe

Molecular Weight: 93.84

Percent Composition: F 40.49%, Fe 59.51%

Line Formula: FeF2

Literature References: Prepn from FeCl2 and HF gas: Kwasnik in Handbook of Preparative Inorganic Chemistry, G. Brauer, Ed. (Academic Press, New York, 2nd ed., 1963) p 266; from Fe powder and liq HF: Muetterties, Castle, J. Inorg. Nucl. Chem. 18, 148 (1961).

Properties: Tetragonal crystals (rutile type) or powder. Sublimes at about 1100°. d 4.09. Sparingly sol in water; more sol in dil HF. Practically insol in alcohol, ether, benzene.

Density: d 4.09

Use: As catalyst in organic reactions.