cryolite
Definition
- Noun:
- A white or colorless mineral consisting primarily of sodium aluminum fluoride (Na₃AlF₆). It is an important source of fluorine and was historically used as a flux to lower the melting point of alumina in the industrial production of aluminum.
Usage Examples
- Noun:
- Cryolite is a rare mineral found in significant quantities only in Greenland.
- The primary use of cryolite was as a solvent for alumina in the Hall-Héroult process for aluminum extraction.
- Under UV light, some specimens of cryolite can exhibit fluorescence.
Advanced Usage
- "Synthetic cryolite": Artificially produced sodium aluminum fluoride, which has largely replaced the natural mineral in industrial applications.
- Most aluminum smelters now use synthetic cryolite.
Variants and Related Words
- Kryolite: An alternative spelling for cryolite.
- Ice stone: An archaic name for cryolite, referring to its ice-like appearance.
- Aluminum fluoride: A related compound, often present with or synthesized alongside cryolite.
Synonyms
- Sodium hexafluoroaluminate: The systematic chemical name for cryolite.
- Aluminum sodium fluoride: A descriptive synonym.
Related Phrases and Terms
- Cryolite deposit: A geological formation containing the mineral cryolite.
- The Ivittuut mine in Greenland was a famous cryolite deposit.
- Cryolite ratio: A term in metallurgy referring to the proportion of cryolite in an electrolytic bath.
Noun
-
a white mineral consisting of fluorides of aluminum and sodium; a source of fluorine
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