Mallardite

General Information:
 Chemical Formula:
Mn++SO4·7(H2O)
 Composition:
(Molecular Weight = 277.11 gm)
Manganese 19.83 % Mn
Hydrogen 5.09 % H 
Sulfur 11.57 % S 
Oxygen 63.51 % O 
 Empirical Formula:
Mn2+(SO4)·7(H2O)
Physical Properties:
 Cleavage:
[001] Good
 Color:
colorless, white, or light pink.
 Density:
1.846
 Diaphaniety:
Transparent
 Habits:
Massive - Fibrous - Distinctly fibrous fine-grained forms., ,
 Hardness:
2 - Gypsum
 Luminescence:
Non-fluorescent.
 Luster:
Vitreous (Glassy)
 Streak:
white
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