VS
Name
—
Fe³⁺₄Ti⁴⁺₃Sb³⁺O₁₃(OH)
Formula
—
Mineral Species
Entry type
—
Oxides & Hydroxides
Chemical class
—
Monoclinic
Crystal system
—
5
Mohs hardness
—
4.53–4.62
Specific gravity
—
—
Streak
—
Resinous to metallic
Luster
—
—
Cleavage
—
P2_1/m
Space group
—
—
Structural group
—
Dby · Grandfathered
IMA
—
1897
Named in
—
Pitch-black; dark brown when translucent; in reflected light, gray with bluish green internal reflections
Typical colors
—
Fe · Ti · Sb · O · H
Elements
—