from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An isometric-hexoctahedral mineral containing aluminum, fluorine, hydrogen, magnesium, oxygen, and sodium.

from the GNU version of the Collaborative International Dictionary of English

  • n. A fluoride of alumina and soda occurring with the Greenland cryolite in octahedral crystals.

from The Century Dictionary and Cyclopedia

  • n. A fluoride of aluminium and calcium, occurring in transparent isometric octahedrons with cryolite in Greenland.


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