VS
Name
—
K₄Ca₂[AlSi₇O₁₇(O₂₋ₓ(OH)ₓ)][(H₂O)₂₋ₓ(OH)ₓ]Cl (x = 0-2)
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Orthorhombic
Crystal system
—
4
Mohs hardness
—
2.42
Specific gravity
—
White
Streak
—
Vitreous to pearly
Luster
—
Perfect on {100}, distinct on {010}
Cleavage
—
Pm2_1n
Space group
—
—
Structural group
—
Fiv · Approved
IMA
—
2009
Named in
—
Colorless
Typical colors
—
K · Ca · Al · Si · O · H · Cl
Elements
—