General Information:
Chemical Formula:NiAs
Composition:(Molecular Weight = 133.61 gm)Nickel 43.93 %
NiArsenic 56.07 %
As Empirical Formula: NiAs
Environment:In ore veins with silver, copper, and nickel arsenides and sulfides.
IMA Status:Not IMA Approved
Locality:Cobalt, Ontario.
Name Origin:Named after its composition.
Physical Properties: Cleavage:[1010] Imperfect, [0001] Imperfect
Color:lead gray, grayish, copper, or black.
Density:7.78 - 7.8, Average = 7.79
Diaphaniety:Opaque
Habits:Massive - Uniformly indistinguishable crystals forming large masses., Reniform - "Kidney like" in shape (e.g.. hematite)., Columnar - Forms columns
Hardness:5.5 - Knife Blade
Luminescence:None.
Luster:Metallic
Streak:brownish black
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