VS
Name
—
Al₂(SO₄)₃(H₂O)₁₂·5H₂O
Formula
—
Mineral Species
Entry type
—
Sulfates
Chemical class
—
Triclinic
Crystal system
—
1.5–2
Mohs hardness
—
1.72–1.77
Specific gravity
—
—
Streak
—
Vitreous to silky
Luster
—
{010}, perfect; probable on {100} and {313}
Cleavage
—
P-1
Space group
—
—
Structural group
—
Alg · Grandfathered
IMA
—
1832
Named in
—
Colorless in crystals, aggregates white, or pale yellow or red from impurities; colorless in transmitted light
Typical colors
—
Al · S · O · H
Elements
—