bornitic

bornite

[bawr-nahyt]
noun
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.

Origin:
1850–55; named after I. von Born (1742–91), Austrian mineralogist; see -ite1

bornitic [bawr-nit-ik] , adjective
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bornite (ˈbɔːnaɪt)
 
n
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: Cu5FeS4
 
[C19: named after I. von Born (1742--91), Austrian mineralogist; see -ite1]

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