Tuesday, 30 August 2011

Cryolite - Sodium Hexafluoroaluminate - Na3AlF6 - 100 g



Chemical formula: Na3AlF6

Synonyms: Kryolite, trisodium hexafluoroaluminate, sodium aluminium fluoride

Amount: 100 g

Appearance and odour: fine white powder without appreciable odour.

Grade: Technical

Packaging: professional wide necked, white HDPE bottle with blue conical seal cap and tamper ring. Labelled. Bottle and cap are UN approved and reusable.

Description and uses: cryolite’s main usage industrially is in the production of aluminium by eletrolysis of a molten eutectic mixture of alumina and cryolite. Once mined, today it is mainly produced industrially.

Because of it chemical inertness and relatively low melting point (1,000 C) it is used also as a flux in pottery glazes.

Because of its eutectic forming properties with alumina, cryolite is also an excellent flux for aluminothermic reduction reactions (better known as ‘Thermite’ or ‘Goldschmidt’ reactions), greatly helping to fluidise the slag/metal mixture and thus promoting good separation of metal and slag. It performs better than the slightly less expensive fluorite (CaF2), the more traditional fluxing agent.

With hot, strong alkalis like NaOH, cryolite decomposes slowly to NaF and alumina.

Cryolite also has the curious property of having almost the exact same refractive index as water. A clear crystal of the material thus seemingly disappears when immersed in water, the subject of a neat party trick.

Dispatch: depending on time of receipt of your order, your item will be dispatched either same day or next day at the latest.

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CAS: 13775-53-6

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