VS
Name
—
(Na,K)₇Ca(Si₆Al₆)O₂₄(S²⁻)₁.₅·H₂O
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Hexagonal
Crystal system
—
5
Mohs hardness
—
2.43
Specific gravity
—
—
Streak
—
Vitreous
Luster
—
Good on {101 0}; poor parting on {0001}
Cleavage
—
P31c
Space group
—
Cancrinite-sodalite
Structural group
—
Bys · Approved
IMA
—
1990
Named in
—
Deep yellow; in thin section, yellow
Typical colors
—
Na · K · Ca · Si · Al · O · S · H
Elements
—