VS
Name
—
Ba₄(Fe³⁺,Ti)₄O₂[B₂Si₈O₂₇]Clₓ
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Orthorhombic
Crystal system
—
5.5
Mohs hardness
—
3.92
Specific gravity
—
—
Streak
—
Vitreous to silky
Luster
—
Perfect on {100}; parting ? {100}
Cleavage
—
Pmmn
Space group
—
—
Structural group
—
Tmel · Grandfathered
IMA
—
1908
Named in
—
Reddish brown
Typical colors
—
Ba · Fe · Ti · O · B · Si · Cl
Elements
—