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Formula: Ag3+xSb1-x (x~0.2)
Alloy of silver and antimony
Crystal System: orthorhombic
Specific gravity: 9.712 measured, 9.720 calculated
Hardness: 3½ to 4
Streak: Silver-white
Colour: Silver-white
Common impurities: Hg
Environments
Dyscrasite occurs in hydrothermal veins, especially
nickel-cobalt-silver-arsenic
veins (Mindat), with other
silver minerals both as a
primary and as a
secondary mineral. Associated minerals include
silver, pyrargyrite,
acanthite, stromeyerite,
tetrahedrite, stibarsen,
galena, calcite and
baryte
(HOM, Mindat).
Localities
At Pribram, Bohemia-Czechoslovakia, silver
pseudomorphs after dyscrasite have been found
(KL p117).
Dyscrasite from Pribram - Image
The type locality is the Wenzel mine, Frohnbach valley, Oberwolfach, Ortenaukreis, Freiburg, Baden-Württemberg,
Germany.
Dyscrasite from the Wenzel Mine - Image
At Johanngeorgenstadt, Erzgebirgskreis, Saxony, Germany, dyscrasite was found in the Frisch Glück mine, intergrown with
skutterudite, löllingite,
rammelsbergite and pitchblende
(MinRec 55.5.596).
Dyscrasite from Johanngeorgenstadt - Image
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