VS
Name
—
CaV⁵⁺₆O₁₆·9H₂O
Formula
—
Mineral Species
Entry type
—
Oxides & Hydroxides
Chemical class
—
Monoclinic
Crystal system
—
—
Mohs hardness
—
2.51–2.61
Specific gravity
—
—
Streak
—
Silky to adamantine
Luster
—
—
Cleavage
—
P2_1/m
Space group
—
Hewettite
Structural group
—
Hew · Grandfathered
IMA
—
1914
Named in
—
Deep red, to chocolate-brown on exposure; red to orange in transmitted light
Typical colors
—
Ca · V · O · H
Elements
—