VS
Name
—
ThO₂
Formula
—
Mineral Species
Entry type
—
Oxides & Hydroxides
Chemical class
—
Cubic
Crystal system
—
6.5–7
Mohs hardness
—
9.7–9.8
Specific gravity
—
Gray to greenish gray
Streak
—
Submetallic when fresh, altering to resinous or hornlike
Luster
—
{001}, poor
Cleavage
—
Fm3m
Space group
—
Fluorite
Structural group
—
Tho · Grandfathered
IMA
—
1904
Named in
—
Black, brownish black, dark gray, dark reddish brown, may have a bronzy tarnish; in transmitted light
Typical colors
—
Th · O
Elements
—