VS
Name
—
Na₂V⁵⁺₆O₁₆·3H₂O
Formula
—
Mineral Species
Entry type
—
Oxides & Hydroxides
Chemical class
—
Monoclinic
Crystal system
—
3
Mohs hardness
—
3.09–3.15
Specific gravity
—
—
Streak
—
Adamantine, less brilliant after exposure
Luster
—
{001}, perfect; {100}, {010}, fair
Cleavage
—
P2_1
Space group
—
Hewettite
Structural group
—
Bar · Approved
IMA
—
1963
Named in
—
Brilliant dark red; brownish red on exposure
Typical colors
—
Na · V · O · H
Elements
—