VS
Name
—
NaCaMnMn₂(AsO₄)₃
Formula
—
Mineral Species
Entry type
—
Arsenates
Chemical class
—
Monoclinic
Crystal system
—
3–4
Mohs hardness
—
4.17–4.22
Specific gravity
—
Yellowish brown
Streak
—
Dull
Luster
—
On pseudo-{10*1}
Cleavage
—
I2/a
Space group
—
Alluaudite
Structural group
—
Apl · Approved
IMA
—
1888
Named in
—
Brownish red to cherry-red, yellow, dark green, gray; orange, light apricot-orange
Typical colors
—
Na · Ca · Mn · As · O
Elements
—