Title: Chromous Fluoride
CAS Registry Number: 10049-10-2
Molecular Formula: CrF2
Molecular Weight: 89.99
Percent Composition: Cr 57.78%, F 42.22%
Literature References: Prepd from CrCl2 + HF: Poulenc, Compt. Rend. 116, 254 (1893); Kwasnik in Handbook of Preparative Inorganic Chemistry Vol. 1, G. Brauer, Ed. (Academic Press, New York, 2nd ed., 1963) pp 256-257. Review of other preparative methods: Sturm, Inorg. Chem. 1, 665-672 (1962).
Properties: Blue-green, monoclinic crystals with iridescent sheen. d 3.79. mp 894°. Sparingly sol in water; practically insol in alcohol; sol in boiling HCl; not attacked by hot dil H2SO4 or HNO3. Changes to Cr2O3 when heated in air.
Melting point: mp 894°
Density: d 3.79
Use: In chromizing; in catalytic cracking of hydrocarbons; alkylation catalyst; in nuclear reactor fuels. |