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Formula: Pd8As3
Arsenide, arsenopalladinite group,
palladium-bearing mineral
Crystal System: Triclinic
Specific gravity: 10.40
Hardness: 4
Colour: Yellowish, creamy white in reflected light.
Common impurities: Cu
Environments
Placer deposits
Hydrothermal environments
Arsenopalladinite occurs in gold deposits, and in alluvial placers and
ultra-basic intrusions. It is an ore of palladium
(Mindat, Webmin).
Localities
At the type locality, Itabira, Minas Gerais, Brazil, arsenopalladinite occurs in grains 0.3 to 1.8 mm in
size in concentrates from gold washing. Associated minerals include
hematite, palladian gold,
atheneite, stillwaterite,
palladseite, isomertieite
and quartz
(AM 59.1332, HOM).
At the Cauê mine, Itabira, Minas Gerais, Brazil, arsenopalladinite is associated with
gold, palladium and
palladseite
(HOM).
At the Siika-Kämä PGE Reef, Portimo complex, Lapland Region, Finland, arsenopalladinite is associated with
stillwaterite, braggite,
vysotskite, sperrylite and
hollingworthite
(HOM).
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