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Formula: (Cu,Fe)Pb9Bi12S28
Sulphosalt, bismuth- lead- and
copper- bearing mineral
Crystal system: Orthorhombic
Specific gravity: 6.75 to 6.88 measured
Hardness: 2½ to 3½
Streak: Lead-grey
Colour: Whitish grey
Common impurities: Ag,Sb
Environments
Metamorphic environments
Hydrothermal environments
Localities
At the type locality, the Bärenbad Mine, Scharnbachgraben, Hollersbach im Pinzgau, Zell am See District, Salzburg,
Austria, eclarite occurs in gold-bearing sulphide ores of
copper located in quartz veins cutting
amphibolite facies metamorphosed
mafic rocks. Associated minerals include
pyrite, arsenopyrite,
chalcopyrite, pyrrhotite,
sphalerite, stannite,
bismuth, gold and
quartz
(HOM).
Eclarite occurs in fan-shaped aggregates of needle-like crystals up to 1.5 cm long, or as granular
fracture-fillings in pyrite and arsenopyrite
(AM 70.214-221).
Eclarite from the Bärenbad Mine - Image
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