antlerite


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antlerite

[′ant·lə‚rīt]
(mineralogy)
Cu3SO4(OH)4 Emerald- to blackish-green mineral occurring in aggregates of needlelike crystals; an ore of copper. Also known as vernadskite.
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The original deposit possessed a leached capping of oxide ore averaging some 27 m in thickness, the principal minerals being malachite, azurite, cuprite, tennantite, brochantite, antlerite and chrysocolla.
However, scientists noticed in 1986 that the surface also contained lots of a sulfur-enriched mineral called antlerite ([Cu.
During a recent property visit by Adrian, it was confirmed that the dominant copper oxide minerals present are brochantite and antlerite.
A dealer may advertise antlerite as a rare species but fail to mention that at Chuquicamata, in northern Chile, home of the largest open-pit copper mine in the world, antlerite is a common ore mineral.
With a slightly different composition and crystal structure, antlerite dissolves more readily in water and is more susceptible to wind erosion than brochantite.
Green acicular crystals of antlerite coating quartz were found on upper levels of the Salvadora vein (Bandy, 1944).
6 cm on edge, sitting up smartly on a green bed of antlerite microcrystals over massive cuprite: this incredible specimen was the talk of the 1987 Tucson show, and was published on the cover of vol.
Imagine their joy when they broke into a treasure pocket containing an amazing, totally gemmy, 1-inch cuprite crystal sitting on antlerite.
Associated minerals are: gypsum, cuprite, antlerite, goethite, lepidocrocite, mbobomkulite, hydrom-bobomkulite, sklodowskite and two undefined uranium minerals.
Antlerite, a rare secondary mineral at Rudabanya, occurs in small fractures in the limonite ores as dull, pale green, powdery coatings and thin layers consisting of randomly intergrown, acicular crystals of microscopic size associated with malachite, covellite and chalcanthite (Szakall et a).
Primary Copper Minerals Secondary Copper Minerals Bornite Tenorite Antlerite Devilline Chalcopyrite Tetrahedrite Aurichalcite Langite Chalcocite Azurite Malachite Covellite Brochantite Metatorbernite Cuprite Calciovolborthite Metazeunerite Digenite Chalcanthite Olivenite Djurleite Chalcoalumite Parnauite Enargite Chrysocolla Vesignieite Lautite Conichalcite Volborthite Tennantite Cyanotrichite Zeunerite
Skip and Marissa Szenics, who collected these, also found some excellent tabular antlerite crystals (to 3 mm) at the Santa Catalina mine, Sierra Gorda, Antofagasta, as well as some new and very fine miniatures of dendritic copper crystals from the Manto Cuba mine, Inca del Oro.