VS
Name
—
KAl₂(Si₃Al)O₁₀(OH)₂
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
2–2.5
Mohs hardness
—
2.77–2.88
Specific gravity
—
White
Streak
—
Vitreous to pearly or silky
Luster
—
{001} perfect; partings on {110}, {010}
Cleavage
—
C2
Space group
—
Mica, Clay
Structural group
—
Ms · Approved
IMA
—
1850
Named in
—
Colorless, White, Gray, Brown, Green, Yellow
Typical colors
—
K · Al · Si · O · H
Elements
—