Pyrobelonite

minerals

cahnite

vanadinite

pyrochroite

Formula: PbMn2+VO4(OH)
Anhydrous vanadate containing hydroxyl, adelite - descloizite group, descloizite - mottramite series
Specific gravity: 5.58 to 5.79
Hardness: 3½
Streak: Orange-yellow, red-orange
Colour: Red, dark red
Environments

Metamorphic environments

Pyrobelonite occurs typically in metamorphosed iron-manganese deposits (Webmin, HOM). Associated minerals include axinite-(Mn), cahnite, dolomite, manganese oxides, manganoan calcite and vanadinite (HOM, Mindat).

Localities

At the type locality, Långban, Filipstad, Värmland County, Sweden, pyrobelonite is associated with hausmannite, pyrochroite, manganite, baryte and calcite (Dana, HOM).

At the Fianel mine, Switzerland, pyrobelonite is associated with medaite, palenzonaite, saneroite, fianelite, parsettensite, rhodochrosite, kutnohorite, aegirine and quartz (HOM).

At Ty Coch Mine, Porthcawl, Bridgend, Wales, UK, pyrobelonite occurs in limestone-hosted hematite deposits forming grains and clusters in calcite with braunite aggregates, hausmannite crystals and partial pseudomorphs thereof, and as lamellae between baryte laths. Often the grains are intimately associated with vanadinite (MW). Other associated minerals include manganoan calcite, romanèchite, baryte, quartz, dolomite and manganese oxides (Dana, HOM).

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