enargite


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enargite

(ˈɛnɑːɡaɪt)
n
a sulphide of copper and arsenic
References in periodicals archive ?
Leinen, "XPS analysis of an electrochemically modified electrode surface of natural enargite," Surface and Interface Analysis, vol.
Although the degree of enrichment (fractionation factor) is different for a variety of copper sulfides (chalcopyrite, chalcocite, bornite, and enargite), in each case, the reactions produce cupric copper ([Cu.sup.+]2) in solution which always has greater [delta][sup.65]Cu [per thousand] than the starting mineral.
Copper recovery of 97%-99% is achieved in about six hours for chalcopyrite concentrates and 12 hours for enargite. The interstage placement of the SMRt reactors provides the advantages of mechano-chemical activation and surface cleaning with only a minimal addition to base-line processing costs.
Selective leaching of antimony and arsenic from mechanically activated tetrahedrite, jamesonite and enargite. International Journal of Mineral Processing, 81(1), 44-50.
The twenty contributions selected as the main body of the text cover a wide variety of subjects, including biomining of base metals from sulphide minerals, microbial extraction of uranium from ores, spectroscopic study on the bioleaching of enargite using thermophile, and many others.
In soil, As is present in the form of oxides, hydroxide, chlorides, and sulfides, such as enargite ([Cu.sub.3]As[A.sub.4]), cobaltite (CoAsS), and skutterudite (CoAs[S.sub.4]) and its average concentration in different regions of the world is 9.36 mg [kg.sup.-1].
Quantitative X-ray photoelectron spectroscopy study of enargite (Cu3AsS4) surface, Surface and Interface Analysis.
The intersection indicates good grade continuity over a strike length of approximately 60m at around 120m below surface, with the high-grade gold mineralisation associated with pyrite-marcasite and enargite breccia fill and veins, similar to the intercept in the discovery hole HC10RCD941.
Therefore the book's chief appeal for collectors is in the slightly sad pleasure its photo gallery offers in showing us nice, aka "interesting," things now gone, or at least unavailable: specimens of Bingham Canyon apophyllite, okenite, copper, enargite, chalcopyrite, tetrahedrite, and a few others, such as we almost surely have never seen.
Laboratory-scale continuous biooxidation of a gold concentrate of high pyrite and enargite content.
Most environmental arsenic occurs naturally, appearing in deposits of minerals and ores including arsenopyrite, enargite, and proustite.
The main problem at Mansa Mina, from a traditional smelting viewpoint, is that concentrates from the deposit contain significant quantities of arsenic in the form of enargite. BIOX[TM] plants have been proven to handle arsenic arising in the process from gold-bearing arsenopyrite concentrates and also to precipitate the arsenic in a stable, environmentally acceptable form.