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Formula: CuPbBi5S9
Sulphosalt, member of the
aikinite-bismuthinite series,
bismuth-bearing mineral
Crystal System: Orthorhombic
Specific gravity: 6.96 measured, 6.903 calculated
Hardness: 2 to 3
Streak: Black
Colour: Tin-white to lead-grey
Common impurities: Fe
Environments
Gladite is of hydrothermal origin. Associated minerals include
bismuthinite-aikinite,
galenobismutite,
makovickyite, nuffieldite,
berryite, galena and
quartz
(HOM).
Localities
At Stanos, Aristotelis, Chalkidiki, Central Macedonia, Greece, the ore is a polymetallic assemblage featuring a wide
mineralogical variety including native bismuth,
bismuthinite, cosalite,
gladite, gustavite,
lillianite homologues,
emplectite associated with native
gold, joséite-A,
galena and chalcopyrite
(CM 51.119-142).
At Ocna de Fier, Caraş-Severin County, Romania, the skarn deposit is
typified by texturally and compositionally specific intergrowths of bismuth
sulphosalts, including skeletal intergrowths in the
gladite-krupkaite compositional range
(EJM 12.4.899–917).
At the type locality, the Gladhammar mines, Västervik, Kalmar County, Sweden, gladite was found as crystals,
2 cm long and 2-6 mm thick, on quartz crystals with
galenobismutite
(AM 10.157-158).
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