Widgiemoolthalite

General Information:
 Chemical Formula:
(Ni,Mg)5(CO3)4(OH)2·4-5(H2O)
 Composition:
(Molecular Weight = 596.99 gm)
Magnesium 6.11 % Mg
Nickel 34.41 % Ni
Hydrogen 1.86 % H 
Carbon 8.05 % C 
Oxygen 49.58 % O 
 Empirical Formula:
Ni3.5Mg1.5(CO3)4(OH)2·4.5(H2O)
 IMA Status:
Approved IMA
Physical Properties:
 Cleavage:
[???] Perfect
 Color:
blue green or green.
 Density:
3.13
 Diaphaniety:
Transparent
 Hardness:
3.5 - Copper Penny
 Luster:
Silky
 Streak:
apple green
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