VS
Name
—
Na₂MnFe²⁺Fe³⁺(PO₄)₃
Formula
—
Mineral Species
Entry type
—
Phosphates
Chemical class
—
Monoclinic
Crystal system
—
4.5
Mohs hardness
—
3.71
Specific gravity
—
—
Streak
—
—
Luster
—
Good on {001}; poor on {110}
Cleavage
—
C2/c
Space group
—
Alluaudite
Structural group
—
Hag · Grandfathered
IMA
—
1954
Named in
—
Greenish black
Typical colors
—
Na · Mn · Fe · P · O
Elements
—