Dietrichite

General Information:
 Chemical Formula:
(Zn,Fe++,Mn)Al2(SO4)4·22(H2O)
 Composition:
(Molecular Weight = 896.04 gm)
Manganese 0.61 % Mn
Aluminum 6.02 % Al
Zinc 4.38 % Zn
Iron 1.87 % Fe
Hydrogen 4.95 % H 
Sulfur 14.31 % S 
Oxygen 67.85 % O 
 Empirical Formula:
Zn0.6Fe2+0.3Mn2+0.1Al2(SO4)4·22(H2O)
Physical Properties:
 Color:
brownish yellow or gray white.
 Density:
1.8
 Diaphaniety:
Transparent
 Habits:
Fibrous - Crystals made up of fibers., ,
 Hardness:
2 - Gypsum
 Luster:
Vitreous (Glassy)
 Streak:
white
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