VS
Name
—
(NH₄)₃KNa₂Fe²⁺Fe³⁺(SO₄)₃Cl₅
Formula
—
Mineral Species
Entry type
—
Sulfates
Chemical class
—
Monoclinic
Crystal system
—
1.5–2
Mohs hardness
—
2.41
Specific gravity
—
Brown
Streak
—
Vitreous
Luster
—
None
Cleavage
—
Cc
Space group
—
—
Structural group
—
The · Approved
IMA
—
2013
Named in
—
Brown to dark brown
Typical colors
—
N · H · K · Na · Fe · S · O · Cl
Elements
—