Zinalsite

Zinalsite is a mineral, being chemically zinc aluminium silicate although its actual formula is uncertain. Discovered in Kazakhstan it is thought to be the product of weathering and chemical alteration of zinc deposits. However it has not been recognized as a valid mineral species.
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General Information:
 Chemical Formula:
Zn2AlSi2O5(OH)4·2(H2O) (?)
 Composition:
(Molecular Weight = 397.99 gm)
Aluminum 6.78 % Al
Zinc 32.86 % Zn
Silicon 14.11 % Si
Hydrogen 2.03 % H 
Oxygen 44.22 % O 
 Empirical Formula:
Zn2AlSi2O5(OH)4·2(H2O)
Physical Properties:
 Color:
white, rose, or reddish brown.
 Density:
3.007
 Hardness:
2.5-3 - Finger Nail-Calcite
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