Součekite

soucekite

watkinsonite

poubaite

wittichenite

Images

Formula: CuPbBi(S,Se)₃
Valence: Cu¹⁺Pb²⁺Bi³⁺(S^2-,Se^2-)₃
Sulphosalt, bournonite group, copper-, lead-, bismuth- and selenium- bearing mineral
Crystal System: Orthorhombic
Specific gravity: 7.60 calculated
Hardness: 3½ to 4
Colour: lead-grey
Common impurities: Te
Environments

Hydrothermal environments

Localities

At the Otish Mountains U deposit, Otish Mountains, Baie-James, Jamésie, Nord-du-Québec, Québec, Canada, součekite occurs in a vein-type uranium deposit with other tellurides and selenides. Associated minerals include watkinsonite, poubaite and wittichenite (HOM).

At the type locality, Oldřichov, Tachov, Tachov District, Plzeň Region, Czech Republic, součekite was described from quartz-carbonate veins, where it occurs with poubaite, clausthalite - galena solid solution minerals, sulphur-bearing rucklidgeite and pitchblende. Polysynthetically twinned součekite replaces watkinsonite and poubaite. More rarely, součekite aggregates are surrounded by wittichenite. It is noteworthy that an assemblage of the paramorphs součekite + aikinite is never observed in the Otish Mountains assemblages (CM 25.4.625-638).
Součekite from Oldřichov - Image

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