VS
Name
—
Mn²⁺Fe³⁺₂(PO₄)₂(OH)₂·4H₂O
Formula
—
Mineral Species
Entry type
—
Phosphates
Chemical class
—
Monoclinic
Crystal system
—
3–4
Mohs hardness
—
2.9
Specific gravity
—
Pale brown
Streak
—
Vitreous
Luster
—
Two, poor
Cleavage
—
P2_1/c
Space group
—
Arthurite
Structural group
—
Esn · Approved
IMA
—
1983
Named in
—
Dark reddish brown, yellowish brown, yellow-orange, bright yellow
Typical colors
—
Mn · Fe · P · O · H
Elements
—