Hydrated normal arsenate, meta-autunite group, the prefix "meta" indicates that this mineral is a dehydration product of zeunerite
Epitaxy: Oriented growths of metazeunerite on trögerite and uranospinite have been found (Mindat).
Specific gravity: 3.64
Hardness: 2 to 2½
Streak: Greenish white
Colour: Grass-green, emerald-green; green in transmitted light
Solubility: Readily soluble in acids
Metazeunerite has been found as a rare secondary arsenate in the oxidised
zones of arsenic-bearing hydrothermal uranium deposits; it commonly forms from dehydration of
zeunerite. Associated minerals include torbernite,
olivenite and chalcophyllite
(HOM, Mindat ).
On the north shore of Lake Athabaska, Saskatchewan, Canada, metazeunerite occurs in vugs and crevices, in close proximity to sulphides, silver and altered pitchblende (AM 36.411-414).
At Cap Garonne, Var, France, metazeunerite occurs with chalcophyllite, olivenite and pharmacosiderite (Dana).
The type locality is the Walpurgis Flacher vein, Weißer Hirsch Mine, Neustädtel, Schneeberg, Erzgebirgskreis, Saxony, Germany.
In the Erongo mountains, Namibia, metazeunerite has been found, rarely, associated with fluorite, quartz and schorl (Minrec 37.5.422-424).
At the W. Wilson mine, near Clancy, Montana, USA, secondary uranium minerals include meta-autunite, metauranocircite, metatorbernite, metazeunerite, uranophane, uranophane-β and phosphuranylite. Uraninite has been leached and altered by ground water to form the secondary minerals (AM 42.222-230).
At the Centennial Eureka mine, Tintic district, Utah, USA, metazeunerite occurs in a sandstone uranium deposit with erythrite and mimetite and other uranium minerals such as torbernite, trögerite, uranospinite and walpurgite (Dana). The metazeunerite occurs as tiny tablets associated with secondary copper arsenates in oxidised limonitic vein material (AM 36.249-255).
Back to Minerals