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Formula: CuAsS
Sulphide, arsenic-bearing mineral
Crystal System: Orthorhombic
Specific gravity: 4.91 measured, 4.878 calculated
Hardness: 3½
Streak: Black
Colour: Black, steel-grey with reddish tone
Environments
Lautite occurs in hydrothermal veins formed at a moderate temperature (Webmin, HOM).
Localities
At Gabe Gottes mine, France, lautite is associated with arsenic,
bismuth, tennantite,
löllingite, rammelsbergite,
proustite and quartz
(HOM).
At Lauta, Germany, lautite is associated with arsenic,
tennantite, proustite,
chalcopyrite, galena and
baryte
(HOM).
At Niederbeerbach, Germany, lautite is associated with kutinaite and
paxite
(HOM).
The type locality is the Rudolph Shaft, Lauta, Marienberg District, Erzgebirgskreis, Saxony, Germany, where lautite is associated with
tennantite, arsenic,
proustite, chalcopyrite,
galena and baryte
(Mindat).
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