Cryolite

Na3AlF6

This sample of cryolite is displayed in the Smithsonian Museum of Natural History. Cryolite is a fluoride of sodium and aluminum with the composition Na3AlF6. The sample at left is about 15 cm across and is from Ivigtut, Greenland. This sample is described as cryolite with siderite.

Mindat: Cryolite

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