VS
Name
—
Mn²⁺₉Al₂Si₈O₂₄(OH)₈
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Triclinic
Crystal system
—
6
Mohs hardness
—
3.48
Specific gravity
—
—
Streak
—
Vitreous
Luster
—
Good on {010}, poor on {012}
Cleavage
—
P-1
Space group
—
—
Structural group
—
Akt · Approved
IMA
—
1969
Named in
—
Yellow-orange to orange-brown
Typical colors
—
Mn · Al · Si · O · H
Elements
—