bornite

American  

[bawr-nahyt] / ˈbɔr naɪt /

noun

1. a common mineral and important ore of copper, copper iron sulfide, Cu 5 FeS 4 , occurring in masses, of brownish color when first exposed to the air; peacock ore.

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bornite British  

/ ˈbɔːnaɪt /

noun

1. Also called: peacock ore.  a mineral consisting of a sulphide of copper and iron that tarnishes to purple or dark red. It occurs in copper deposits. Formula: Cu 5 FeS 4

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Other Word Forms

• bornitic adjective

Etymology

Origin of bornite

1850–55; named after I. von Born (1742–91), Austrian mineralogist; -ite ¹

Example Sentences

Past open pit production at this mine was dominated by copper and gold from chalcopyrite and bornite.

From Textbooks • Jan. 1, 2017

Perikon.—A detector in which a bornite crystal makes contact with a zincite crystal.

From The Radio Amateur's Hand Book by Collins, A. Frederick (Archie Frederick)

In the easy recognition of the secondary copper sulphides, chalcocite, bornite, etc., the engineer finds a finger-post on the road to extension in depth; and the directions upon this post are not to be disregarded.

From Principles of Mining Valuation, Organization and Administration by Hoover, Herbert

For example, all the specimens of bornite and pyrrhotite examined yielded sulphuretted hydrogen with tartaric, citric, and oxalic acids, but chalcopyrite and pyrite do not.

From The Galaxy, April, 1877 Vol. XXIII.—April, 1877.—No. 4. by Various

Much of the copper of commerce is made from chalcopyrite and bornite, and these ores are more difficult to work.

From An Elementary Study of Chemistry by McPherson, William