Zinc-rich zincolibethenite from Broken Hill, New South Wales

Zinc-rich zincolibethenite with the empirical formula (Zn1.06CuO.94) 2.00 [(P1.02As0.01) 1.03 O4]OH (simplified formula (Zn,Cu)2PO4OH), occurs in ferruginous gossan from the No 3 lens, 280 RL level, Block 14 open cut, Broken Hill, New South Wales, Australia, associated with corkite-hinsdalite, tsumebite, pyromorphite, sampleite, torbernite, dufrenite, strengite and beraunite. Zinc-rich libethenite and olivenite are also associated with the zone, together with members of the libethenite-olivenite series. It is possible that solid solution in the phosphate series extends to the orthorhombic polymorph of composition Zn2P040H. The crystal structure of a Broken Hill sample has been refined to R1(F) =0.0227 (single-crystal X-ray intensity data; a =8.323(1), b=8.251(1), c=5.861(1) A, V = 402.5(1) A3; structural formula Zn(Cu0.94Zn0.06)[(P0.98As0.02)O4]OH). Detailed physical and chemical data are presented, some of which supplement the partially incomplete data for type zincolibethenite from Zambia.