VS
Name
—
Ca₂Mn³⁺₃O₂(PO₄)₃·3H₂O
Formula
—
Mineral Species
Entry type
—
Phosphates
Chemical class
—
Monoclinic
Crystal system
—
3.5
Mohs hardness
—
3.13–3.17
Specific gravity
—
Chocolate-brown
Streak
—
Vitreous to resinous or waxy, silky in fibrous material
Luster
—
On {100}, good
Cleavage
—
A2/a
Space group
—
Arseniosiderite
Structural group
—
Rbt · Approved
IMA
—
1973
Named in
—
Black, deep red, bronzy; dark reddish brown to deep blood-red in thin slivers
Typical colors
—
Ca · Mn · O · P · H
Elements
—