1. a mineral, sodium aluminum fluoride, Na3AlF6, occurring in white masses, used as a flux in the electrolytic production of aluminum.

Origin of cryolite

First recorded in 1795–1805; cryo- + -lite
Also called Greenland spar. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for cryolite

Historical Examples of cryolite

  • "There's a seam of cryolite in the Eastern Hills, according to the old maps," said Lake.

    Space Prison

    Tom Godwin

  • And now how many of my readers can tell me what cryolite is?

    Among the Esquimaux

    Edward S. Ellis

  • Potassium borofluoride may be readily prepared from cryolite.

  • The cryolite is a rare mineral and the sole one which has become an article of trade in Greenland.

    The Great Frozen Sea

    Albert Hastings Markham

  • He helped us to make our way to Ivignut, where the cryolite mines are, and thence we got back to England by way of Denmark.

    Among the Esquimaux

    Edward S. Ellis

British Dictionary definitions for cryolite


  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: Na 3 AlF 6
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