VS
Name
—
Pb(U⁴⁺,U⁶⁺)Fe²⁺₂(Ti,Fe²⁺,Fe³⁺)₁₈(O,OH)₃₈
Formula
—
Mineral Species
Entry type
—
Oxides & Hydroxides
Chemical class
—
Hexagonal
Crystal system
—
6–7
Mohs hardness
—
4.74
Specific gravity
—
Black
Streak
—
Bright submetallic
Luster
—
None
Cleavage
—
R-3
Space group
—
Crichtonite
Structural group
—
Ceu · Approved
IMA
—
1998
Named in
—
Black, light gray to white in reflected light
Typical colors
—
Pb · U · Fe · Ti · O · H
Elements
—