VS
Name
—
KZn₃(Si₃Al)O₁₀(OH)₂
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
2.5–3
Mohs hardness
—
2.86–3.43
Specific gravity
—
—
Streak
—
—
Luster
—
{001}, perfect
Cleavage
—
C2/m
Space group
—
Mica
Structural group
—
Hds · Approved
IMA
—
1965
Named in
—
Coppery brown, bronze-brown, dark reddish brown to reddish black
Typical colors
—
K · Zn · Si · Al · O · H
Elements
—