a. A reddish metallic element that takes on a bright metallic luster and is malleable, ductile, and a good conductor of heat and electricity. Symbol, Cu. Occasionally occurs native, and is found in many minerals such as cuprite, malachite, azurite, chalcopyrite, and bornite. Its alloys, brass and bronze, are very important; U.S. coins are now copper alloys. Its oxides and sulfates are used as an agricultural poison and as an algicide in water purification. Handbook of Chemistry and Physics, 3
b. An isometric native metal Cu ; metallic, red, soft, ductile and malleable; sp gr, 8.9; in oxidized zones of copper deposits, formerly a major source of native copper; the only native metal to occur abundantly in large masses; commonly occurs in dendritic clusters or mossy aggregates, sheets, or in plates filling narrow cracks or fissures. See also: native copper
Source:
Dictionary of Mining, Mineral, and Related Terms












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