VS
Name
—
Ca₆Al₂(SO₄)₂B(OH)₄(OH,O)₁₂·26H₂O
Formula
—
Mineral Species
Entry type
—
Sulfates
Chemical class
—
Hexagonal
Crystal system
—
2.5
Mohs hardness
—
1.77
Specific gravity
—
White
Streak
—
Vitreous to dull
Luster
—
Perfect on 1010
Cleavage
—
P31c
Space group
—
Ettringite
Structural group
—
Chrl · Approved
IMA
—
1981
Named in
—
Colorless, white, pale yellow, pale pink
Typical colors
—
Ca · Al · S · O · B · H
Elements
—