• synonyms


noun Mineralogy.
  1. a white hydrous chloride of potassium and magnesium, KMgCl3⋅6H2O, used chiefly as a source of potassium and magnesium.
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Origin of carnallite

1875–85; named after R. von Carnall (1804–74), German mining official; see -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for carnallite

Historical Examples of carnallite

  • What weight of carnallite is necessary in the preparation of 500 g. of magnesium?

    An Elementary Study of Chemistry

    William McPherson

  • At the point K we have the highest temperature at which carnallite can exist with magnesium chloride in contact with solution.

  • In the first place it may be again noted that at a temperature above 167.5 (point M) carnallite cannot exist.

  • Fig. 113 is a diagrammatic sketch of the model for carnallite looked at sideways from above.

  • Carnallite contains nearly a fourth of its weight of potassium chloride.

British Dictionary definitions for carnallite


  1. 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.MgCl 2 .6H 2 O
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Word Origin for carnallite

C19: named after Rudolf von Carnall (1804–74), German mining engineer; see -ite 1
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