Nomenclature
CAS number: 10049-10-2
CrF
2; mol wt 89.99.
Cr 57.78%, F 42.22%.
Description and 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.Use
In chromizing; in catalytic cracking of hydrocarbons;
alkylation catalyst; in nuclear reactor fuels.