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Cryolite (Na3AlF6)-Pieces

Cryolite (Na3AlF6)-Pieces

Molecular Formula: Na3AlF6
Purity: 99.96%
Products Code: TR11130900PC
Specification Model: 3 - 6 mm
CAS: 13775-53-6 The product is not available now.
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Cryolite (Na3AlF6)-Pieces introduce:

Characteristic

Cryolite (Na3AlF6, sodium hexafluoroaluminate) is an uncommon mineral identified with the once-large deposit at Ivittuut on the west coast of Greenland, depleted by 1987.

Formula: Na3•AlF6

Formula mass:209.9 g mol−1

Color:Colorless to white, also brownish, reddish and rarely black

Dana classification:11.6.1.1

Crystal system:Monoclinic

Crystal habit:Usually massive, coarsely granular. The rare crystals are equant and pseudocubic

Tenacity:Brittle

Mohs scale hardness:2.5 to 3

Melting point:1012 °C

Solubility:Soluble in AlCl3 solution, soluble in H2SO4 with the evolution of HF, which is poisonous. Insoluble in water.

Application

Cryolite is used as an insecticide and a pesticide. It is also used to give fireworks a yellow color. Molten cryolite is used as a solvent for aluminium oxide (Al2O3) in the Hall–Héroult process, used in the refining of aluminium. It decreases the melting point of molten (liquid state) aluminium oxide from 2000–2500 °C to 900–1000 °C, and increases its conductivity thus making the extraction of aluminium more economical.

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