sodium cryolite

Description

Cryolite (Sodium aluminium fluoride) Formulaï&frac*4;šï&frac*4;®a3AlF6 Molecular Weightï&frac*4;š**9.*4 Propertiesï&frac*4;š It is a colorless monoclinic crystal, but often appears off-white, pompadour, straw yellow or black because of impurities. It has relative density of 2.**3.0, mp ***0℃. It is slightly soluble in water, and its aqueous is acidic. It decomposes to release poisonous HF gas when meets sulfuric acid. Usagesï&frac*4;šIt is used as flux in aluminium smelting, cropper insecticide, flux and whiting agent of enamel glaze. It is also used in the manufacture of milky white glass, aluminium alloy and boiling steel, and in ingredient of grinding wheel. Execute standardï&frac*4;š State standard GB/T********9