VS
Name
—
Na₂Ca(SO₄)₂
Formula
—
Mineral Species
Entry type
—
Sulfates
Chemical class
—
Monoclinic
Crystal system
—
2.5–3
Mohs hardness
—
2.75–2.85
Specific gravity
—
White
Streak
—
Vitreous to waxy, pearly on {001} cleavage surfaces
Luster
—
{001}, perfect; {110}, imperfect
Cleavage
—
C2/c
Space group
—
—
Structural group
—
Glb · Grandfathered
IMA
—
1808
Named in
—
White, Gray, Yellow, Colorless
Typical colors
—
Na · Ca · S · O
Elements
—