VS
Name
—
Al₄Ta₃O₁₃(OH)
Formula
—
Mineral Species
Entry type
—
Oxides & Hydroxides
Chemical class
—
Hexagonal
Crystal system
—
7.5
Mohs hardness
—
6.68–6.82
Specific gravity
—
White
Streak
—
Adamantine
Luster
—
—
Cleavage
—
P3
Space group
—
—
Structural group
—
Spn · Grandfathered
IMA
—
1938
Named in
—
White to cream, yellow to yellow-brown when altered; colorless in transmitted light
Typical colors
—
Al · Ta · O · H
Elements
—