Langisite

General Information:
 Chemical Formula:
(Co,Ni)As
 Composition:
(Molecular Weight = 133.79 gm)
Cobalt 33.04 % Co
Nickel 10.97 % Ni
Arsenic 56.00 % As
 Empirical Formula:
Co0.75Ni0.25As
 IMA Status:
Approved IMA 1969
Physical Properties:
 Color:
pink or reddish gray.
 Density:
8.17
 Diaphaniety:
Opaque
 Hardness:
6-6.5 - Orthoclase-Pyrite
 Luster:
Metallic
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