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[mag-nuh-sahyt] /ˈmæg nəˌsaɪt/
a mineral, magnesium carbonate, MgCO 3 , having a characteristic conchoidal fracture and usually occurring in white masses.
1805-15; magnes(ia) + -ite1; compare French magnésite Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for magnesite
  • The carbonate that is produced, magnesite, is a commercial product one could look up.
  • Molded of magnesite cement, they are lighted by hidden electric bulbs.
  • magnesite and other carbonates are common accessories.
  • Privatization efforts were continuing in the magnesite and refractories industries.
British Dictionary definitions for magnesite


a white, colourless, or lightly tinted mineral consisting of naturally occurring magnesium carbonate in hexagonal crystalline form: a source of magnesium and also used in the manufacture of refractory bricks. Formula: MgCO3
Word Origin
C19: from magnesium + -ite1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Encyclopedia Article for magnesite

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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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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