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[kahr-nl-ahyt] /ˈkɑr nlˌaɪt/
noun, Mineralogy
a white hydrous chloride of potassium and magnesium, KMgCl 3 ⋅6H 2 O, used chiefly as a source of potassium and magnesium.
1875-85; named after R. von Carnall (1804-74), German mining official; see -ite1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for carnallite
  • carnallite ore is the raw material from which magnesium is obtained electrolytically.
British Dictionary definitions for carnallite


a white or sometimes coloured mineral consisting of a hydrated chloride of potassium and magnesium in orthorhombic crystalline form: a source of potassium and also used as a fertilizer. Formula: KCl.MgCl2.6H2O
Word Origin
C19: named after Rudolf von Carnall (1804–74), German mining engineer; see -ite1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Encyclopedia Article for carnallite

a soft, white halide mineral, hydrated potassium and magnesium chloride (KMgCl36H2O), that is a source of potassium for fertilizers. Carnallite occurs with other chloride minerals in the upper layers of marine salt deposits, where it appears to be an alteration product of pre-existing salts. The mineral is found principally in the northern German salt deposits; and also in Spain, Tunisia, and the southwestern United States. For detailed physical properties, see halide mineral (table)

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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