VS
Name
—
(Al,Fe,Zn)₂(Al,Sn)₆O₁₁(OH)
Formula
—
Mineral Species
Entry type
—
Oxides & Hydroxides
Chemical class
—
Hexagonal
Crystal system
—
8–9
Mohs hardness
—
4.25–4.51
Specific gravity
—
Yellow-brown
Streak
—
Vitreous
Luster
—
Distinct to perfect on {0001}
Cleavage
—
P-3m1
Space group
—
Hogbömite-Nigerite
Structural group
—
Fng-2N1S · Approved
IMA
—
1947
Named in
—
Dark brown, red-brown, red; brownish yellow, brown, or yellow in transmitted light
Typical colors
—
Al · Fe · Zn · Sn · O · H
Elements
—