VS
Name
—
(Bi,Pb)₂(Fe³⁺,Fe²⁺)O₂(OH)(PO₄)
Formula
—
Mineral Species
Entry type
—
Phosphates
Chemical class
—
Monoclinic
Crystal system
—
4.5
Mohs hardness
—
6.83
Specific gravity
—
Pale brown
Streak
—
Vitreous to adamantine
Luster
—
—
Cleavage
—
C2/m
Space group
—
—
Structural group
—
Bde · Approved
IMA
—
1997
Named in
—
Black; dark brown in transmitted light
Typical colors
—
Bi · Pb · Fe · O · H · P
Elements
—