Finnemanite

finnemanite

hematite

rouseite

trigonite

Images

Formula: Pb5(As3+O3)3Cl
Arsenite containing halogen
Specific gravity: 7.265
Hardness: 2½
Streak: Grey
Colour: Grey to black; pale olive-green in transmitted light
Environments

Metamorphic environments

Finnemanite is a very rare mineral.

Localities

At the type locality, Långban, Filipstad, Värmland County, Sweden, finnemanite occurs in crevices in hematite in a metamorphosed iron-manganese orebody. Associated minerals include hematite, rouseite and trigonite (HOM, Mindat).

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