VS
Name
—
CoAs₃
Formula
—
Mineral Species
Entry type
—
Sulfides
Chemical class
—
Cubic
Crystal system
—
5.5–6
Mohs hardness
—
6.5
Specific gravity
—
Black
Streak
—
Metallic. R: (400) 55.3, (420) 56.0, (440) 56.4, (460) 56.6, (480) 56.4, (500) 56.1, (520) 55.7, (540) 55.3
Luster
—
Distinct on {001} and {111}; in traces on {011}
Cleavage
—
Im3
Space group
—
Perovskite, Skutterudite
Structural group
—
Skt · Grandfathered
IMA
—
1845
Named in
—
Tin-white to silver-gray, tarnishes gray or iridescent; in polished section, gray, creamy or golden white
Typical colors
—
Co · As
Elements
—