Say again 3 oxidation 2 aluminium, often referred to as the
"alumina", it is a kind of white powder which is amorphous,
commonly known as alumina. The patent for Al2O3, corundum type
crystal close to atomic crystals, other of crystalline is basically
ion crystals, its good liquidity, soluble in water, can dissolve in
the molten cryolite-alumina melts. It is the main raw material
aluminium electrolysis
