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cryolite

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cryolite

Rare granular crystalline mineral (sodium aluminium fluoride), Na3AlF6, used in the electrolytic reduction of bauxite to aluminium. It is chiefly found in Greenland.

In the extraction of aluminium from the ore bauxite (impure aluminium oxide), the alumina (pure aluminium oxide) has to be molten for electrolysis to take place. Alumina has a very high melting point (2,047°C/13,717°F), which would require a lot of energy to keep it as a liquid, so the alumina is dissolved in molten cryolite instead. Far less energy is required and a temperature of 950°C/1,750°F can be used.

Cryolite also occurs in Colorado at Pike's Peak.
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Material safety data sheets of the patient's work revealed potential for exposure to the following substances: phenolic resins, teflon, calcium oxide, graphite, nickel, copper, silicon carbide, aluminum oxide, silver, chromium, magnesium oxide, tin, glass, cryolite, silica, iron, tungsten, tungsten carbide, phosphorus, and cobalt.
Occupational asthma with paroxysmal atrial fibrillation in a diamond ... by Szeinuk, Jaime / Environmental Health Perspectives
Manufacturer and/or Grade BLOW MOLDING, EXTRUSION AND INJECTION MOLD - CYRO XT-Polymer XT250 Cryolite G-20HIFLO XT-Polymer XT375 EXTRUSION AND INJECTION MOLDING - CYRO Cyrolite G20-100 - Nova Chemicals NAS 30 NAS 21 INJECTION MOLDING - CYRO XT-Polymer XT-X800RG Cyrolite GS-90 XT-Polymer XT-2000 XT-Polymer X800RH - Nova Chemicals Zylar 93-546 NAS 36 Zylar ST 94-560 See Ad/ Melt Data Filler/ Flow Sheets, Rainf Rate, Page Features, Type, g/10 No.
ACRYLIC COPOLYMERS by Plastics Technology
Cryolite has a melting point of 182SF (996C) and does not react with silica, as does iron oxide, to form a slag; cryolite will liquefy in-situ to form a barrier.
Porosity in Iron Castings from Mold-Metal Interface Reactions by Naro, R.L. / Modern Casting
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