VS
Name
—
CaAl₂Si₂Al₂O₁₀(OH)₂
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
3.5–4.5
Mohs hardness
—
2.99–3.08
Specific gravity
—
White
Streak
—
Pearly on cleavage, vitreous on lateral faces
Luster
—
{001}, perfect
Cleavage
—
Cc
Space group
—
Mica, Clay
Structural group
—
Mrg · Approved
IMA
—
1821
Named in
—
White, Pink, Gray
Typical colors
—
Ca · Al · Si · O · H
Elements
—