Cryolite
? Molecular formula:Na3AlF6 ? Molecular weight :209.94 ? Properties:Crystal white powder. Slightly soluble in water, density 2.95~3, melting point 1000℃ ?Use:Electrolytic aluminium flux, pesticide, flux, auxiliaries. ?GB/T4291-1999
Chemical Constituents
Special grade
First order
Second grade
Fluorine(F)% ≥
53
Sodium (Na)%≤
32
Aluminum (Al)%≥
13
Water(H2O)%≤
0.4
0.5
0.8
Silica(SiO2)%≤
0.25
0.36
Ferric oxide (Fe2O3)%≤
0.05
0.08
0.10
Sulfate(SO4)% ≤
0.7
1.20
1.30
Phsophorus pentoxide(P2O5)% ≤
0.02
0.03
Ignition loss 550,30MIN ≤
2.5
3.00
Calcium oxide% ≤
0.15
0.20
