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Formula: AgMnPb3Sb5S12
Sulphantimonide,
lillianite homologous series group,
manganese-bearing mineral
Crystal System: Orthorhombic
Specific gravity: 5.51 calculated
Hardness: 3½
Colour: Grey
Common impurities: Fe,Se
Environments
Localities
At the type locality, the Uchucchacua Mine, Oyon Province, Lima, Peru, uchucchacuaite occurs in a telescoped hydrothermal
deposit associated with alabandite, galena,
benavidesite, sphalerite,
pyrite, pyrrhotite and
arsenopyrite
(HOM).
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