VS
Name
—
PbO₂
Formula
—
Mineral Species
Entry type
—
Oxides & Hydroxides
Chemical class
—
Orthorhombic
Crystal system
—
—
Mohs hardness
—
9.867
Specific gravity
—
Dark brown
Streak
—
Submetallic
Luster
—
[{100}, perfect; {010}, imperfect] (forms by analogy to columbite)
Cleavage
—
Pbcn
Space group
—
Columbite
Structural group
—
Sny · Approved
IMA
—
1984
Named in
—
Dark reddish brown, clove-brown, red on thin edges; in reflected light
Typical colors
—
Pb · O
Elements
—