Xanthiosite

General Information:
 Chemical Formula:
Ni3(AsO4)2
 Composition:
(Molecular Weight = 453.91 gm)
Nickel 38.79 % Ni
Arsenic 33.01 % As
Oxygen 28.20 % O 
 Empirical Formula:
Ni3(AsO4)2
 IMA Status:
Approved IMA 1965
Physical Properties:
 Color:
golden yellow.
 Density:
5.37 - 5.47, Average = 5.42
 Hardness:
4 - Fluorite
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