Långbanite

minerals

berzeliite

richterite

hausmannite

Formula: Mn2+4Mn3+9Sb5+O16(SiO4)2
Antimonate
Specific gravity: 4.9
Hardness: 6½
Streak: Brown
Colour: Black
Environments:

Metamorphic environments

Långbanite occurs in crystalline limestone and manganese-rich skarn in metamorphosed manganese deposits (Webmin). Associated minerals include manganese-rich aegirine, richterite, braunite, magnetite, hausmannite, rhodonite and hedyphane (HOM).

The type locality is Långban, Filipstad, Värmland County, Sweden.

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