VS
Name
—
(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆·28H₂O
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Orthorhombic
Crystal system
—
3–4
Mohs hardness
—
2.12–2.15
Specific gravity
—
white
Streak
—
Vitreous, pearly on {010}, silky if fibrous
Luster
—
Perfect on {100}, distinct on {010}
Cleavage
—
Cmc2_1
Space group
—
Mordenite
Structural group
—
Mor · Approved
IMA
—
1864
Named in
—
White, Pink, Yellow, Colorless
Typical colors
—
Na · Ca · K · Al · Si · O · H
Elements
—