VS
Name
—
Mg₄(PO₄)₂(OH,O)(F, )
Formula
—
Mineral Species
Entry type
—
Phosphates
Chemical class
—
Orthorhombic
Crystal system
—
3.5–4
Mohs hardness
—
2.97
Specific gravity
—
—
Streak
—
Vitreous
Luster
—
On {001}, perfect; on {101}, distinct
Cleavage
—
Pnma
Space group
—
—
Structural group
—
Ahs · Approved
IMA
—
1974
Named in
—
Pale gray, reddish brown
Typical colors
—
Mg · P · O · H · F
Elements
—