Bradaczekite : NaCu4(AsO4)3
As recorded:
Second scoria cone, Northern Breakthrough, Great Fissure eruption, Tolbachik Volcanic field, Milkovsky District, Kamchatka Krai, Russia
Photo added to mindat.org
“Dark blue bradaczekite crystals associated with chalcocite. Photograph was taken through a plastic container. Brent Thorne specimen and photograph.”
Brent Thorne - 30th November 2000
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