VS
Name
—
Al₂Si₄O₁₀(OH)₂
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Triclinic
Crystal system
—
1–1.5
Mohs hardness
—
2.65–2.9
Specific gravity
—
white
Streak
—
Pearly to dull
Luster
—
Perfect on {001}
Cleavage
—
C2/c
Space group
—
Clay, Pyrophyllite
Structural group
—
Prl · Grandfathered
IMA
—
1829
Named in
—
White, Colorless, Green, Gray, Yellow, Brown
Typical colors
—
Al · Si · O · H
Elements
—