Selenide, sphalerite group, forms a series with metacinnabar. Selenium mineral.
Streak: Greyish black
Colour: Steel-grey to black
Tiemannite is found in hydrothermal veins associated with the selenides
naumannite, klockmannite and
umangite, and also metacinnabar,
baryte, manganese oxides and calcite
At the type locality, St Lorenz Mine, Burgstatt veins, Clausthal-Zellerfeld, Goslar, Lower Saxony, Germany, massive tiemannite is separated from chalcopyrite by a calcite vein (AM 35.337-364).
Common impurities: Cd,S,Pb
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