VS
Name
—
(Ti,V³⁺,Fe³⁺,Al)₁₂As³⁺₂O₂₃(OH)
Formula
—
Mineral Species
Entry type
—
Oxides & Hydroxides
Chemical class
—
Triclinic
Crystal system
—
6.5–7
Mohs hardness
—
4.613
Specific gravity
—
Black
Streak
—
Metallic to submetallic
Luster
—
—
Cleavage
—
P-1
Space group
—
—
Structural group
—
Hlo · Approved
IMA
—
1987
Named in
—
Black; gray in reflected light
Typical colors
—
Ti · V · Fe · Al · As · O · H
Elements
—