Hannebachite

General Information:
 Chemical Formula:
2CaSO3·(H2O)
 Composition:
(Molecular Weight = 258.30 gm)
Calcium 31.03 % Ca
Hydrogen 0.78 % H 
Sulfur 24.83 % S 
Oxygen 43.36 % O 
 Empirical Formula:
Ca2(SO3)2·(H2O)
 IMA Status:
Approved IMA
Physical Properties:
 Cleavage:
[???] Perfect
 Color:
colorless.
 Density:
2.52
 Diaphaniety:
Transparent
 Hardness:
3.5 - Copper Penny
 Luster:
Vitreous (Glassy)
 Streak:
white
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