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Items
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Chemical Composition ( Concentration )/ % | |||||||||
| Not less than | Not more than | |||||||||
| F | Al | Na | SiO 2 | Fe 2 O 3 | SO 4 = | CaO | P 2 O 5 | H 2 O | 
Loss on ignition
 550ºC30min  | 
|
| CH-0 | 52 | 12 | 33 | 0.25 | 0.05 | 0.6 | 0.15 | 0.02 | 0.20 | 2.0 | 
| CH-1 | 52 | 12 | 33 | 0.36 | 0.08 | 1.0 | 0.20 | 0.03 | 0.40 | 2.5 | 
| CM-0 | 53 | 13 | 32 | 0.25 | 0.05 | 0.6 | 0.20 | 0.02 | 0.20 | 2.0 | 
| CM-1 | 53 | 13 | 32 | 0.36 | 0.08 | 1.0 | 0.60 | 0.03 | 0.40 | 2.5 | 
Size distribution
| Granular | 0-10 mm | 
| Sandy | 80 mesh | 
| Powder | 200 mesh, 325mesh | 
Physical properties
Cryolite is a kind of complex compound or double salt. Caused by impurity, the appearance can be white, gray ,yellow powder or crystalline particles. It's melting point is 1025ºC, stacking density is 0.6-1.0g/L, true density is 2.95-3.05g/cm 3 , heat of formation is 225KJ, specific gravity is 2.75-3.00g/cm 3 , heat of fusion is 107KJ. Slightly solubte in water.