VS
Name
—
Ba₄Mn²⁺₄Fe³⁺₂(Si₂O₇)₂(SO₄)₂O₂(OH)₂
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
—
Crystal system
—
4.5
Mohs hardness
—
4.42
Specific gravity
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Dark brown
Streak
—
Vitreous to subadamantine (crystal faces), resinous (fractures). Color: Almost black, reddish black (thin fragments)
Luster
—
Perfect on {001}, good on {110}
Cleavage
—
—
Space group
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Ericssonite
Structural group
—
Zgv · Approved
IMA
—
2020
Named in
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Almost black, reddish black (thin fragments)
Typical colors
—
Ba · Mn · Fe · Si · O · S · H
Elements
—