VS
Name
—
Ni²⁺Ni³⁺₂S₄
Formula
—
Mineral Species
Entry type
—
Sulfides
Chemical class
—
Cubic
Crystal system
—
4.5–5.5
Mohs hardness
—
4.5–4.8
Specific gravity
—
—
Streak
—
Metallic, brilliant on fresh surface. R: (400) 44.3, (420) 44.8, (440) 45.3, (460) 45.7, (480) 46.0, (500) 46.2
Luster
—
Imperfect on {001}; reported on {111}
Cleavage
—
Fd3m
Space group
—
Spinel
Structural group
—
Pld · Grandfathered
IMA
—
1876
Named in
—
Pale gray to steel-gray, tarnishing to copper-red
Typical colors
—
Ni · S
Elements
—