bornite
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born·ite
(bôr′nīt′)n.
A brownish-bronze, lustrous copper ore with the composition Cu5FeS4 that tarnishes to purple when exposed to air.
[After Ignaz von Born (1742-1791), Austrian 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.
bornite
(ˈbɔːnaɪt)n
(Minerals) a mineral consisting of a sulphide of copper and iron that tarnishes to purple or dark red. It occurs in copper deposits. Formula: Cu5FeS4. Also called: peacock ore
[C19: named after I. von Born (1742–91), Austrian mineralogist; see -ite1]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
born•ite
(ˈbɔr naɪt)n.
a copper sulfide mineral, Cu5FeS4, occurring in brown masses that tarnish to purple.
[1850–55; after I. von Born (1742–91), Austrian mineralogist; see -ite1]
bor•nit′ic (-ˈnɪt ɪk) adj.
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Noun | 1. | bornite - a mineral consisting of sulfides of copper and iron that is found in copper deposits atomic number 29, copper, Cu - a ductile malleable reddish-brown corrosion-resistant diamagnetic metallic element; occurs in various minerals but is the only metal that occurs abundantly in large masses; used as an electrical and thermal conductor mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition |
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