VS
Name
—
Fe²⁺Fe²⁺₂(PO₄)₂
Formula
—
Mineral Species
Entry type
—
Phosphates
Chemical class
—
Monoclinic
Crystal system
—
5
Mohs hardness
—
3.67–3.79
Specific gravity
—
White to pale pink
Streak
—
Vitreous towards resinous
Luster
—
On {010}, good; on {100}, fair
Cleavage
—
P2_1/c
Space group
—
Graftonite
Structural group
—
Gft · Approved
IMA
—
1900
Named in
—
Salmon-pink to reddish brown, dark brown when altered; in transmitted light, nearly colorless
Typical colors
—
Fe · P · O
Elements
—