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enargite

[en-ahr-jahyt, en-er-jahyt] /ɛnˈɑr dʒaɪt, ˈɛn ərˌdʒaɪt/
noun
1.
a mineral, copper arsenic and sulfide, Cu 3 AsS 4 , occurring in the form of black orthorhombic crystals having perfect cleavage: an important source of copper.
Origin
1850-1855
1850-55; < Greek enarg(ḗs) brilliant (en- en-2 + -argēs, akin to argós bright, árgyros silver) + -ite1
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for enargite
  • Our results show indications of isotopic signatures of both abiotic chalcopyrite and enargite dissolution.
Encyclopedia Article for enargite

sulfosalt mineral, copper arsenic sulfide (Cu3AsS4), that is occasionally an important ore of copper. It occurs as heavy, metallic-gray crystals and masses in veins and replacement deposits. Economically valuable deposits have been found in the Balkans; at several places in Peru; Chuquicamata, Chile; and Butte, Mont. It forms orthorhombic crystals. For detailed physical properties, see sulfosalt (table)

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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