follow Dictionary.com

How do you spell Hannukah?

illite

[il-ahyt] /ˈɪl aɪt/
noun
1.
any of a group of clay minerals, hydrous potassium aluminosilicates, characterized by a three-layer micalike structure and a gray, light green, or yellowish-brown color.
Origin
1937
1937; ill(inois) + -ite1
Related forms
illitic
[ih-lit-ik] /ɪˈlɪt ɪk/ (Show IPA),
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
Examples from the web for illite
  • Dyna- illite only brought the remains of old shipwrecks to the surface.
  • Infiltration capacity seems to be influenced by the proportion of illite within the silt sized fraction.
British Dictionary definitions for illite

illite

/ˈɪlaɪt/
noun
1.
a clay mineral of the mica group, found in shales and mudstones. Crystal structure: monoclinic. Formula: K1–1.5Al4(Si6.5–7Al1–1.5O20)(OH)4
Word Origin
C20: named after Illinois, where it was first found
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
Cite This Source
Encyclopedia Article for illite

any of a group of mica-type clay minerals widely distributed in marine shales and related sediments. Illite contains more water and less potassium than true micas, but it has a micalike sheet structure and is poorly crystallized. It may form a chemical series with both muscovite and montmorillonite; it is a weathering product of muscovite and alters to montmorillonite under humid conditions. For chemical formula and detailed structure and physical properties, see clay mineral (table); mica (table)

Learn more about illite with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source

Word of the Day

Difficulty index for illite

Many English speakers likely know this word

Word Value for illite

6
8
Scrabble Words With Friends