cryolite
Na3ALF6,cas no:13775-53-6,15096-52-3,it is colorless monoclinic system crystal,non
pure is greyish white,light yellow,light red or black.mainly used as fluxing agent for aluminium
electrolysis,also used as anti wear additive for abrasive products,as flux for iron alloy and rimmed steel,
as emulsifying agent forenamel,as opacifier for glass etc.