VS
Name
—
(Fe³⁺,Mn²⁺)₃(PO₄)₂(OH,H₂O)₃
Formula
—
Mineral Species
Entry type
—
Phosphates
Chemical class
—
Orthorhombic
Crystal system
—
3.5–4
Mohs hardness
—
3.31
Specific gravity
—
Yellowish brown
Streak
—
Vitreous to dull
Luster
—
Perfect on {001}
Cleavage
—
Pbna
Space group
—
Reddingite
Structural group
—
Kry · Grandfathered
IMA
—
1950
Named in
—
Deep red-brown, dark blackish brown to light golden-brown, bronze on cleavage surfaces
Typical colors
—
Fe · Mn · P · O · H
Elements
—