Formula: (NaCa2)Mn2+2(AsO4)3
Anhydrous normal arsenate. Forms a series with berzeliite.
Specific gravity: 4.28 to 4.46
Hardness: 4½ to 5
Streak: White to orange
Colour: Yellow-orange, yellowish red; colorless to orange in transmitted light.
Solubility: Readily soluble in nitric or hydrochloric acid

Metamorphic environments

Manganberzeliite occurs in metamorphosed manganiferous skarns.

At the type locality, Långban, Filipstad, Värmland, Sweden, manganberzeliite occurs in a metamorphosed manganese deposit, associated with manganese-rich biotite, hausmannite, rhodonite, tephroite, pyrochroite, bergslagite, caryinite, richterite, hedyphane, sarkinite, eveite, tilasite, baryte and calcite.

At Franklin, New Jersey, USA, manganberzeliite occurs in a metamorphosed stratiform zinc orebody, associated with sarkinite, hedyphane, schallerite, franklinite, willemite and calcite.

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