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[key-uh-luh-nahyt] /ˈkeɪ ə ləˌnaɪt/
a very common mineral, hydrated aluminum disilicate, Al 2 Si 2 O 5 (OH) 4 , formed by the alteration of other minerals, especially feldspar: the most common constituent of kaolin.
Origin of kaolinite
1865-70; kaolin + -ite1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for kaolinite
  • Fire clay comprises mainly diaspore, halloysite, and/or kaolinite.
  • The kaolinite was a pure form of the mineral that is produced commercially for use in paint pigments.
  • This enables dissolution of kaolinite and precipitation of gibbsite.
British Dictionary definitions for kaolinite


a white or grey clay mineral consisting of hydrated aluminium silicate in triclinic crystalline form, the main constituent of kaolin. Formula: Al2Si2O5(OH)4
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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kaolinite in Science
A soft, white triclinic mineral occurring in friable masses. Kaolinite forms as the result of the hydrothermal alteration or weathering of feldspar. It is used in the ceramic industry. Chemical formula : Al2Si2O5(OH)4.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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