VS
Name
—
Fe³⁺₅V⁴⁺₃V⁵⁺₁₂O₃₉(OH)₉·9H₂O
Formula
—
Mineral Species
Entry type
—
Oxides & Hydroxides
Chemical class
—
Monoclinic
Crystal system
—
2.5
Mohs hardness
—
3.4–3.6
Specific gravity
—
Black, with slight brownish tint
Streak
—
Adamantine, dull in aggregates
Luster
—
Perfect on {001}
Cleavage
—
—
Space group
—
—
Structural group
—
Kaz · Approved
IMA
—
1988
Named in
—
Black
Typical colors
—
Fe · V · O · H
Elements
—