magnetite


magnetite
/mag"ni tuyt'/, n.
a very common black iron oxide mineral, Fe3O4, that is strongly attracted by magnets: an important iron ore.
[1850-55; MAGNET + -ITE1; cf. G Magnetit]

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or lodestone or magnetic iron ore

Iron oxide mineral (Fe3O4), the chief member of one of the series of the spinel group.

Minerals in this series form black to brownish, metallic, moderately hard octahedrons and masses in igneous and metamorphic rocks and in granite pegmatites, stony meteorites, and high-temperature sulfide veins. Magnetite, as the name implies, is strongly attracted to a magnet. It is a common constituent of iron ores. Magnetite with an intrinsic magnetic field (a natural magnet) is known as lodestone.

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also called  lodestone , or  magnetic iron ore 

      iron oxide mineral (FeFe2O4, or Fe3O4) that is the chief member of one of the series of the spinel (q.v.) group. Minerals in this series form black to brownish, metallic, moderately hard octahedrons and masses in igneous and metamorphic rocks and in granite pegmatites, stony meteorites, and high-temperature sulfide veins. The magnetite series also contains magnesioferrite (magnesium iron oxide, MgFe2O4), franklinite (zinc iron oxide, ZnFe2O4), jacobsite (manganese iron oxide, MnFe2O4), and trevorite (nickel iron oxide, NiFe2O4). All are magnetic, although franklinite and jacobsite are only weakly so; magnetite, which frequently has distinct north and south poles, has been known for this property since about 500 BC. For detailed physical properties, see oxide mineral (table).

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Universalium. 2010.

Look at other dictionaries:

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  • Magnetite — Magnétite Magnétite Général Nom IUPAC tétraoxyde de trifer No CAS …   Wikipédia en Français

  • magnétite — [ maɲetit ] n. f. • 1873; du rad. de magnétique ♦ Chim. Minerai noir, oxyde magnétique naturel de fer. ● magnétite nom féminin Oxyde naturel de fer magnétique de formule Fe3O4, appartenant au groupe des spinelles, utilisé comme minerai de fer.… …   Encyclopédie Universelle

  • Magnetite — Mag net*ite, n. (Min.) An oxide of iron ({Fe3O4}) occurring in isometric crystals, also massive, of a black color and metallic luster. It is readily attracted by a magnet and sometimes possesses polarity, being then called {loadstone}. It is an… …   The Collaborative International Dictionary of English

  • magnetite — (n.) magnetic iron ore, 1840, from Ger. magnetit; see MAGNET (Cf. magnet) + ITE (Cf. ite) (1) …   Etymology dictionary

  • magnetite — s. f. 1.  [Mineralogia] Óxido natural de ferro magnético. 2.  [Mineralogia] Denominação científica da pedra ímã.   ♦ Grafia no Brasil: magnetita …   Dicionário da Língua Portuguesa

  • magnetite — [mag′nə tīt΄] n. [Ger magnetit: see MAGNET & ITE1] a black, hard, magnetic mineral, (Fe,Mg)Fe2O4, that is a major ore of iron: cf. LODESTONE (sense 1) …   English World dictionary

  • Magnetite — Not to be confused with Magnesite or Maghemite. Magnetite Magnetite and pyrite from Piedmont Italy …   Wikipedia

  • magnetite — magnetitas statusas T sritis fizika atitikmenys: angl. magnetic iron ore; magnetite vok. Magneteisenerz, n; Magnetit, m rus. магнетит, m; магнитный железняк, m pranc. magnétite, f …   Fizikos terminų žodynas

  • magnétite — magnetitas statusas T sritis fizika atitikmenys: angl. magnetic iron ore; magnetite vok. Magneteisenerz, n; Magnetit, m rus. магнетит, m; магнитный железняк, m pranc. magnétite, f …   Fizikos terminų žodynas


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