VS
Name
—
Ca₆Si₂[(SO₄)₂(SO₃)₂(OH)₁₂]·22H₂O
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Hexagonal
Crystal system
—
2–2.5
Mohs hardness
—
1.82
Specific gravity
—
White
Streak
—
Vitreous; silky aggregates
Luster
—
Distinct on {100}
Cleavage
—
P6_3
Space group
—
Ettringite
Structural group
—
Hsc · Approved
IMA
—
2011
Named in
—
Colorless; snow-white aggregates
Typical colors
—
Ca · Si · S · O · H
Elements
—