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Formula: CuAs2
Arsenide
Crystal System: Monoclinic
Specific gravity: 5.4 measured, 5.97 calculated
Hardness: 3½ to 4
Streak: Black
Colour: Grey
Environments:
Metamorphic environments
Hydrothermal environments
Paxite is a rare arsenide.
Localities
At the type locality, Černý Důl, Krkonoše Mountain, Czech Republic, paxite occurs in hydrothermal
calcite veins (Dana, Webmin) cutting
diopside hornfels lenses, in
pyroxene gneiss
and mica schist. It is
probably a late-stage reaction product formed at the expense of novákite
and
arsenic below 130oC. Associated minerals include
novákite, koutekite,
arsenic, arsenolamprite,
silver,
löllingite, nickeline,
chalcocite,
skutterudite, bornite,
chalcopyrite,
tiemannite,
clausthalite,
uraninite, hematite
and fluorite
(HOM).
The paxite is inter-grown with novákite,
koutekite and especially
with arsenic
(AM47.1484).
At Niederbeerbach, Germany, paxite is associated with lautite
and kutinaite
(HOM).
At Mohawk, Michigan, USA, paxite is associated with domeykite,
algodonite and koutekite
(HOM).
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