Formula: (Co,Ni)As
Origin of name: After locality; Langis mine, Ontario, Canada
Crystal system: Hexagonal
Crystal class: 6/m 2/m 2/m
Twinning:
Unit cell:
Colour: Pinkish-buff in reflected light
Diaphaneity: Opaque
Luster: Metallic
Habit: Minute irregular grains and lamellae
Hardness: 6
Specific gravity: 8.174
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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