pyrrhotite

pyrrhotite
/pir"euh tuyt'/, n.
a common mineral, iron sulfide, approximately FeS but variable because of a partial absence of ferrous ions, occurring in massive and in crystal forms with a bronze color and metallic luster; magnetic pyrites: generally slightly magnetic.
[1868; < Gk pyrrhót(es) redness + -ITE1]

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Iron sulfide mineral in which the ratio of iron to sulfur atoms is somewhat variable but is always slightly less than 1.

It commonly is found in association with other sulfides. The variety troilite, with a composition near that of iron sulfide (FeS), is an important constituent of some meteorites.

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      iron sulfide mineral (Fe1–xS) in the niccolite group; in it, the ratio of iron to sulfur atoms is variable but is usually slightly less than one. It commonly is found with pentlandite and other sulfides in silica-poor igneous rocks, as at Kongsberg, Nor.; Andreas-Berg, Ger.; Trentino, Italy; and Sudbury, Ont. The variety troilite, with a composition near that of iron sulfide (FeS), is an important constituent of some meteorites. The crystals possess hexagonal symmetry; for detailed physical properties, see sulfide mineral (table).

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Universalium. 2010.

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  • pyrrhotite — [pir′ə tīt΄] n. [< Gr pyrrhotēs, redness (< pyrrhos, flame colored < pyr, FIRE) + ITE1] a bronze colored, typically magnetic, hexagonal mineral, Fex 1Sx, usually found with pentlandite; iron sulfide …   English World dictionary

  • Pyrrhotite — Pyrrhotine Pyr rho*tine, Pyrrhotite Pyr rho*tite, n. [Gr. ? flame colored, fr. ? fire.] (Min.) A bronze colored mineral, of metallic luster. It is a sulphide of iron, and is remarkable for being attracted by the magnet. Called also {magnetic… …   The Collaborative International Dictionary of English

  • pyrrhotite — noun Etymology: modification of German Pyrrhotin, from Greek pyrrhotēs redness, from pyrrhos red, from pyr fire more at fire Date: 1868 a bronze colored mineral of metallic luster that consists of ferrous sulfide and is attracted by a magnet …   New Collegiate Dictionary

  • pyrrhotite — noun A weakly magnetic ferrous sulfide mineral, FeS. Syn: magnetic pyrites …   Wiktionary

  • pyrrhotite —    A cave mineral FeS [11] …   Lexicon of Cave and Karst Terminology

  • pyrrhotite — pyr·rho·tite …   English syllables

  • pyrrhotite — pyr•rho•tite [[t]ˈpɪr əˌtaɪt[/t]] n. mir a bronze colored magnetic mineral, iron sulfide, occurring in massive and in crystal forms • Etymology: 1868; < Gk pyrrhót(ēs) redness + ite I …   From formal English to slang

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