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An uncommon, white, vitreous natural fluoride of aluminum and sodium, Na3AlF6, nearly invisible in water in powdered form and used chiefly in the electrolytic recovery of aluminum. Also called Greenland spar.
(Minerals) a white or colourless mineral consisting of a fluoride of sodium and aluminium in monoclinic crystalline form: used in the production of aluminium, glass, and enamel. Formula: Na3AlF6
a mineral, sodium aluminum fluoride, Na3AlF6, occurring in white masses, used as a flux in the electrolytic production of aluminum.
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|Noun||1.||cryolite - a white mineral consisting of fluorides of aluminum and sodium; a source of fluorine|
atomic number 9, fluorine, F - a nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite
mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition