VS
Name
—
Ca₃Al(SO₄)[B(OH)₄](OH)₆·12H₂O
Formula
—
Mineral Species
Entry type
—
Sulfates
Chemical class
—
Hexagonal
Crystal system
—
3
Mohs hardness
—
1.79
Specific gravity
—
White
Streak
—
Vitreous
Luster
—
Perfect on {100}
Cleavage
—
P6_3
Space group
—
Ettringite
Structural group
—
Tat · Approved
IMA
—
2015
Named in
—
Colorless; white aggregates
Typical colors
—
Ca · Al · S · O · B · H
Elements
—