cryolite
/ˈkraɪəˌlaɪt/
noun
- A white or colorless mineral (sodium aluminum fluoride) used in the production of aluminum and in making glass and enamel.
- Cryolite is added to aluminum ore to lower the melting point during smelting.
- The factory uses synthetic cryolite instead of the natural mineral for environmental reasons.
- Miners once extracted cryolite from a large deposit in Greenland.