VS
Name
—
NaAlMg₂(Si₂Al₂)O₁₀(OH)₂
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
2.5
Mohs hardness
—
2.96
Specific gravity
—
—
Streak
—
—
Luster
—
Perfect on {001}
Cleavage
—
C2/m
Space group
—
Mica
Structural group
—
Pwk · Approved
IMA
—
1979
Named in
—
Pale green; in thin section, colorless
Typical colors
—
Na · Al · Mg · Si · O · H
Elements
—