VS
Name
—
KFe³⁺₃(SO₄)₂(OH)₆
Formula
—
Mineral Species
Entry type
—
Sulfates
Chemical class
—
Hexagonal
Crystal system
—
2.5–3.5
Mohs hardness
—
2.91–3.26
Specific gravity
—
Pale yellow
Streak
—
Subadamantine to vitreous, resinous on fractures
Luster
—
On {0001}, distinct
Cleavage
—
R-3m
Space group
—
Alunite-Alunite
Structural group
—
Jrs · Approved
IMA
—
1852
Named in
—
Brown, Yellow, Orange
Typical colors
—
K · Fe · S · O · H
Elements
—