VS
Name
—
BaMn²⁺₂Fe³⁺(Si₂O₇)O(OH)
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Orthorhombic
Crystal system
—
4.5
Mohs hardness
—
4.21
Specific gravity
—
Rich brown
Streak
—
—
Luster
—
Perfect on {100}, fair on {011}
Cleavage
—
C2/m
Space group
—
Ericssonite
Structural group
—
Ers · Approved
IMA
—
1966
Named in
—
Deep reddish black; in thin section, brown to yellowish brown
Typical colors
—
Ba · Mn · Fe · Si · O · H
Elements
—