VS
Name
—
Na₃K(Al₄Si₄O₁₆)
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Hexagonal
Crystal system
—
5.5–6
Mohs hardness
—
2.55–2.66
Specific gravity
—
white
Streak
—
Vitreous to greasy
Luster
—
Poor on {1010}, {0001}
Cleavage
—
P6_3
Space group
—
Tridymite-Nepheline, Tridymite-Nepheline
Structural group
—
Nph · Approved
IMA
—
1801
Named in
—
White, Colorless, Gray
Typical colors
—
Na · K · Al · Si · O
Elements
—