VS
Name
—
Ca₃Si(SO₄)₂(OH)₆·12H₂O
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Hexagonal
Crystal system
—
2–2.5
Mohs hardness
—
1.92
Specific gravity
—
—
Streak
—
Vitreous to silky (aggregates)
Luster
—
None
Cleavage
—
P6_3/m
Space group
—
Ettringite
Structural group
—
Khm · Approved
IMA
—
2011
Named in
—
Snow-white, colorless in transmitted light
Typical colors
—
Ca · Si · S · O · H
Elements
—