Karpinskite

General Information:
 Chemical Formula:
(Mg,Ni)2Si2O5(OH)2 (?)
 Composition:
(Molecular Weight = 253.18 gm)
Magnesium 9.60 % Mg
Silicon 22.19 % Si
Nickel 23.18 % Ni
Hydrogen 0.80 % H 
Oxygen 44.24 % O 
 Empirical Formula:
NiMgSi2O5(OH)2
 Environment:
An inadequately described mineral.
 Locality:
Mizhne Tagilsk massif, Ural Mountains, Russia.
 Name Origin:
Named for Alexander Petrovich Karpinsky (1846-1936), Russian geologist and president of the Russian Academy of Sciences.
Physical Properties:
 Cleavage:
[???] Perfect
 Color:
colorless, greenish blue, or light blue.
 Density:
2.53 - 2.63, Average = 2.58
 Diaphaniety:
Translucent
 Habits:
Massive - Granular - Common texture observed in granite and other igneous rock., ,
 Hardness:
2.5-3 - Finger Nail-Calcite
 Luster:
Greasy (Oily)
 Streak:
white
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