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Formula: Cu7[(Cu,Ag)0.33Pb1.33Bi11.33]S22
Sulphosalt, bismuth-bearing mineral
Crystal System: Monoclinic
Specific gravity: 6.80 calculated
Hardness: 4
Colour: Grey
Environments
Padĕraite occurs intimately intergrown with other
lead-bismuth sulphosalts,
particularly, members of the cuprobismutite homologous series
group and the
bismuthinite -
aikinite series. Associated minerals include
hammarite, pekoite,
bismuthinite,
cuprobismutite,
hodrušite,
chalcopyrite,
grossular and andradite
(HOM).
Localities
At the type locality, the Băiţa mining district, Nucet, Bihor County, Romania, padĕraite occurs in
intimate microscopic intergowths with bismuthinite -
pekoite, hammarite, and
several other unidentified opaque minerals. Other associated minerals include
cuprobismutite,
hodrušite,
chalcopyrite,
grossular and andradite.
Padĕraite is steel-grey changing to brown to black upon surface alteration.
(AM 72.224, Mindat).
At the Paulus Mine, Ocna de Fier, Caraş-Severin County, Romania, an assemblage consisting of
bismuthinite derivatives, mainly
cuprobismutite, padĕraite,
and hodrušite occurs within the
skarn, with hodrušite
as the least abundant component
(CM 41.441-456).
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