Cryolite

n.

1.

(Min.) A fluoride of sodium and aluminum, found in Greenland, in white cleavable masses; - used as a source of soda and alumina.

Noun

1.

cryolite - a white mineral consisting of fluorides of aluminum and sodium; a source of fluorine Synonyms: Greenland spar

atomic number 9, F, fluorine, Greenland spar, mineral