/mag"neuh suyt'/, n.
a mineral, magnesium carbonate, MgCO3, having a characteristic conchoidal fracture and usually occurring in white masses.
[1805-15; MAGNES(IA) + -ITE1; cf. F magnésite]

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 the mineral magnesium carbonate (MgCO3), a member of the calcite group of carbonate minerals that is a principal source of magnesium. The mineral has formed as an alteration product from magnesium-rich rocks or through the action of magnesium-containing solutions upon calcite. Notable deposits are those at Radenthein, Austria; the Liaotung Peninsula, Liaoning Province, China; and Clark County, Nev., U.S. Iron is usually present, and a complete chemical substitution series exists between magnesite and siderite in which iron replaces magnesium. Magnesite is used as a refractory material, a catalyst and filler in the production of synthetic rubber, and a material in the preparation of magnesium chemicals and fertilizers. For detailed physical properties, see carbonate mineral (table).

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Universalium. 2010.

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  • Magnesite — Mag ne*site, n. [Cf. F. magn[ e]site.] (Min.) Native magnesium carbonate occurring in white compact or granular masses, and also in rhombohedral crystals. [1913 Webster] …   The Collaborative International Dictionary of English

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  • magnesite — mag•ne•site [[t]ˈmæg nəˌsaɪt[/t]] n. mir a mineral, magnesium carbonate, MgCO3, usu. occurring in white masses: a source of magnesium oxide • Etymology: < F magnésite (1797); see magnesia, ite I …   From formal English to slang

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