bornite

born·ite

B0404800 (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.]

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]

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.

Thesaurus

Noun

bornite - a mineral consisting of sulfides of copper and iron that is found in copper depositspeacock oreatomic 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 conductormineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition

Bornite

bornite

[′bȯr‚nīt] (mineralogy) Cu₅FeS₄ A primary mineral in many copper ore deposits; specific gravity 5.07; the metallic and brassy color of a fresh surface rapidly tarnishes upon exposure to air to an iridescent purple.

Bornite

(named after the Austrian metallurgist and mineralogist I. Born, 1742–91), a mottled copper ore, a mineral and a sulfide of copper and iron corresponding to the formula CusFeS₄. It contains 52–65 percent copper and 8–12 percent iron. It crystallizes into a cubic system; a modification of a rhombic system is known. Its crystalline structure is of the spinel type. Crystals (cubic or dodecahedral habits) are rare; dense grainy masses are common. They are dark colored, copper red, usually with bright mottled oxide tint in old fractures. Its hardness on the mineralogical scale is 3, and its density is 4,900–5,300 kg/m³.

Bornite is of varying origin. As a hypogene mineral, it is formed in various types of hypothermal deposits. During supergene processes, it is formed in the zone of secondary sulfide concentration. Evolutions of supergene bornite are found in sedimentary rocks, sometimes in the form of pseudomorphoses by organic residues. In hydrothermal deposits, bornite usually is found in association with chalcopy-rite, pyrite, sphalerite, and fahlerz (gray copper ore). It is observed rather frequently in deposits of the type of pyrite seams. Malachite, azurite, cuprite, and other minerals are formed from bornite in oxidation zones. Bornite is an important mineral of copper ores. Deposits of bornite in the USSR are found in the Urals, in the Caucasus, and in Kazakhstan; they are found abroad in the USA, Yugoslavia, South West Africa, and the German Democratic Republic.

bornite

born·ite

bornite

born•ite

Bornite

bornite

Bornite

bornite

Synonyms for bornite

noun a mineral consisting of sulfides of copper and iron that is found in copper deposits

Synonyms

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