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Greenland spar

noun, Mineralogy
1.

cryolite

[krahy-uh-lahyt] /ˈkraɪ əˌlaɪt/
noun
1.
a mineral, sodium aluminum fluoride, Na 3 AlF 6 , occurring in white masses, used as a flux in the electrolytic production of aluminum.
Also called Greenland spar.
Origin
1795-1805
1795-1805; cryo- + -lite
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for greenland-spar

cryolite

/ˈkraɪəˌlaɪt/
noun
1.
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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Encyclopedia Article for greenland-spar

cryolite

colourless to white halide mineral, sodium aluminum fluoride (Na3AlF6). It occurs in a large deposit at Ivigtut, Greenland, and in small amounts in Spain, Colorado, U.S., and elsewhere. It is used as a solvent for bauxite in the electrolytic production of aluminum and has various other metallurgical applications, and it is used in the glass and enamel industries, in bonded abrasives as a filler, and in the manufacture of insecticides. A large amount of synthetic cryolite is made from fluorite. For detailed physical properties, see halide mineral (table)

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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