VS
Name
—
Ca₃Si(OH)₆(CO₃)(SO₄)·12H₂O
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Hexagonal
Crystal system
—
3.5
Mohs hardness
—
1.877
Specific gravity
—
—
Streak
—
Vitreous to dull, greasy, silky
Luster
—
Traces observed
Cleavage
—
P6_3/m
Space group
—
Ettringite
Structural group
—
Tma · Grandfathered
IMA
—
1878
Named in
—
Colorless, white, pale yellow
Typical colors
—
Ca · Si · O · H · C · S
Elements
—