VS
Name
—
Mn²⁺₂₆[As³⁺₆(OH)₄O₁₄][As³⁺₆O₁₈]₂(CO₃)
Formula
—
Mineral Species
Entry type
—
Carbonates
Chemical class
—
Hexagonal
Crystal system
—
4
Mohs hardness
—
4.43
Specific gravity
—
Brown
Streak
—
—
Luster
—
{0001}, fair to poor
Cleavage
—
P-3
Space group
—
—
Structural group
—
Amg · Grandfathered
IMA
—
1920
Named in
—
Black to pale brown; yellow to brown in transmitted light
Typical colors
—
Mn · As · O · H · C
Elements
—