Zinccopperite-A New Variety of Zinc-Copper Intermetallic Compounds Discovered in a Porphyry-Copper Deposit

Autor:	Lu Yan, Xiao Yuanfu, Wang Jiangzhen, Sun Yan, Wen Chun-qi
Rok vydání:	2010
Předmět:	Mineral Chalcopyrite Perthite Metallurgy Mineralogy chemistry.chemical_element Geology engineering.material Copper Porphyry copper deposit chemistry visual_art visual_art.visual_art_medium engineering Pyrite Quartz Biotite
Zdroj:	Acta Geologica Sinica - English Edition. 72:308-313
ISSN:	1000-9515
DOI:	10.1111/j.1755-6724.1998.tb00408.x
Popis:	Zinccopperite (tentatively named) is a rare native alloy mineral discovered in quartz monzonite—porphyry in the Xifanping area, Yanyuan County, Sichuan Province. It is a new variety of zinc—copper alloy mineral found for the first time in the porphyry-copper deposit in China. Its intergrown minerals are K—feldspar (mainly perthite), albite—oligoclase, quartz and biotite; and the associated minerals include pyrite and chalcopyrite. It is characterized by a golden reflection colour, being isotropic (isometric), with the grain size ranging from 10 to 50 μm, microhardness VHN10 = 190 kg/mm2, and reflectance RVM = 67.97%. Electron microprobe (Model JXA—733) analysis shows Cu = 59.15%–62.55% and Zn = 36.32%–39.85%. The crystallochemical formula is Cu6.27-7.0Zn4.0, simplified as Cu7Zn4.
Databáze:	OpenAIRE
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