covellite


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Related to covellite: Enargite

co·vel·lite

 (kō-vĕl′īt′, kō′və-līt′)
n.
A lustrous indigo-blue mineral, CuS, an important ore of copper.

[After Nicolò Covelli (1790-1829), Italian mineralogist.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

covellite

(kəʊˈvɛlaɪt; ˈkəʊvəˌlaɪt)
n
an indigo-blue copper sulphide ore, often referred to as blue copper or indigo copper
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

co•vel•lite

(koʊˈvɛl aɪt, ˈkoʊ vəˌlaɪt)

n.
a mineral, copper sulfide, CuS, indigo in color and usu. occurring as a massive coating on other copper minerals.
[1840–50; after NicolòCovelli (1790–1829), Italian mineralogist who found it; see -ite1]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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References in periodicals archive ?
The mineralogy of the milled Haib feed revealed that 98.5% of the total copper content occurred as chalcopyrite, 1% as bornite, and less than 0.5% as chalcocite, covellite, malachite and chrysocolla.
The surface mineralisation at BEP and BWP comprises chalcocite, covellite and digenite mineralisation with lesser chalcopyrite.
Copper sulphides such as CuS (covellite), [Cu.sub.1.75]S (anilite), [Cu.sub.1.8]S (digenite), [Cu.sub.1.95]S (djurlite), and [Cu.sub.2]S are of great interest as they can be applied in energy storage, owing to their variations in stoichiometric compositions, complex structures, and valence states [11].
Late stage covellite (CuS) normally accompanies supergene chalcocite, further demonstrating the reductive nature of the reaction.
* Phase 2: Stronger and later overprinting mineralization events are also evident in most of the new drill holes, including widespread garnet-bearing skarns containing clots, veins, and disseminations of covellite, native copper, and bornite, with local formation of secondary chalcocite.
We also investigated the XRD pattern for CuS powder synthesized by the same starting solution of the SILAR method, and all diffraction peaks were assigned to covellite CuS crystal phase (see our supporting information, Figure S4).
There are five stable phases of [Cu.sub.x]S at room temperature which vary according to values of x (1 [less than or equal to] x [less than or equal to] 2): chalcocite ([Cu.sub.2]S), djurleite ([Cu.sub.1.95]S), digenite ([Cu.sub.1.8]S), anilite ([Cu.sub.1.75]S), and covellite (CuS) [8, 9].
Several additional surface-reaching minerals were identified that did not contribute to the golden sheen: pyrite, baryte, covellite, zircon, muscovite, albite and K-feldspar.