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Formula: Cu3Au
Alloy of copper and gold,
auricupride subgroup,
perovskite supergroup,
paramorph of bogdanovite
Crystal System: Isometric
Specific gravity: 11.5 measured, 13.77 calculated
Hardness: 3½
Colour: Yellow with a reddish tint; in reflected light, violet-rose
Environments
Auricupride occurs in hydrothermal veins probably formed below 390oC
(Ramdohr p336).
Associated minerals include gold, copper
and other gold-copper alloys
(HOM).
Localities
At the type locality, the Zolotaya Gora Au deposit, Soimon Valley, Karabash ophiolite massif, Karabash, Chelyabinsk
Oblast, Russia, auricupride occurs in serpentinites as the
product of low-temperature ordering and unmixing of gold -
copper solid solution alloys
(HOM).
At Rheinfelden, Aargau, Switzerland, auricupride occurs in reduction halos in Permian (298.9 to 251.9 million
years ago) red beds
(HOM).
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