Zincolivenite

olivenite

Formula: CuZn(AsO4)(OH)
Anhydrous arsenate containing hydroxyl, olivenite group, intermediate member of the solid solution series between olivenite and adamite.
Specific gravity: 4.34
Hardness: 3½
Streak: White
Colour: Green, greenish blue
Environments

Hydrothermal environments

Zincolivenite is an uncommon secondary mineral typically found only as microcrystals or microcrystalline crusts in the oxidised section of arsenide and sulpharsenide-bearing mineral deposits, particularly where tennantite is a primary mineral (MW).

At the type locality, Agios Konstantinos, Lavrion District Mines, Lavreotiki, Attica, Greece, zincolivenite occurs in the cavities of limonite ores, associated with scorodite, pharmacoalumite, jarosite, conichalcite and arseniosiderite (Mindat).

At Tynagh Mine, Killimor, County Galway, Connacht, Ireland, supergene zincolivenite was formed by the weathering of tennantite (R&M 12.3-11).

At Wheal Phoenix, near Liskeard, Cornwall, England, UK, zincolivenite has been found with azurite (R&M 12.3-11).

At Penberthy Croft Mine, St Hilary, Cornwall, England, UK, zincolivenite has been found in a single specimen of heavily limonitised quartz associated with bayldonite and beudantite (R&M 12.10-14).

At Potts Gill Mine, Caldbeck, Allardale, Cumbria, England, UK, zincolivenite is commonly found with philipsburgite and zálesíite (R&M 12.3-11).

At the Sandbed and Driggith mines, Caldbeck, Allardale, Cumbria, England, UK, zincolivenite is usually found on its own, but occasionally it is associated with bayldonite, mimetite or hemimorphite (R&M 12.3-11).

At Stennerskeugh Clouds Mine, Kirkby Stephen, Eden, Cumbria, England, UK, zincolivenite has been found with azurite, duftite and mimetite in baryte- and tennantite-bearing veinstone (R&M 12.3-11).

At the Dolyhir Quarry, Old Radnor, Powys, Wales, UK, zincolivenite occurs in a galena - tennantite - baryte vein as crusts on calcite and azurite and with associated tyrolite (MW), R&M 12.3-11).

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