VS
Name
—
Ca₄Mn³⁺₂Al₂(Mn³⁺Mg)(SiO₄)₂(Si₃O₁₀)(VO₄)(OH)₆
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Orthorhombic
Crystal system
—
5.5–6
Mohs hardness
—
3.374
Specific gravity
—
Beige
Streak
—
Vitreous
Luster
—
Perfect on {100}, good on {010} and {001}
Cleavage
—
Pnmm
Space group
—
Ardennite
Structural group
—
Apt · Approved
IMA
—
2016
Named in
—
Brownish red
Typical colors
—
Ca · Mn · Al · Mg · Si · O · V · H
Elements
—