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(Minerals) a clay mineral consisting of hydrated aluminium silicate: an important component of bentonite
[C19: named after Montmorillon, French town where it was first found, + -ite1]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌmɒnt məˈrɪl əˌnaɪt)

any of a group of clay minerals that expand when they absorb water.
[1850–55; after Montmorillon, France, where it was found; see -ite1]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
However, presence of montmorillonite and hydromica along with kaolinite in natural sample explains higher yield of acidic products.
However, exfoliating clay is difficult, and it is usually done by treating natural montmorillonite with a metal cation.
We recommend using virgin, untreated Montmorillonite clay, which has great therapeutic benefit.
The aim of the first stage of this study is to determine the density, thermal conductivity and pH of the several pastes obtained from mixing clinoptiolite (zeolite) and montmorillonite with seawater and tri-distilled water, for their possible use in thermal therapy and dermo-cosmetics.
RHEO-CLAY: provides a high-inverted yield point (YP)--plastic viscosity (PV) ratio for improved rate of penetration, optimum hole cleaning, and greater liquid/solids separation efficiency from hydrocyclones--differs from sodium bentonite (montmorillonite) by having lower cation exchange capacity and greater yield in the presence of high hardness (Ca++ / Mg++) and sodium (Na+) values.
The uncured composition of claim 1, wherein the layered filler comprises at least one silicate selected from montmorillonite, nontronite, beidellite, bentonite, volkonskoite, laponite, hectorite, saponite, sauconite, magadite, kenyaite, stevensite, vermiculite, halloysite, aluminate oxides, hydrotalcite and mixtures thereof.
Scientists at Texas A&M University have developed a film that combines particles of montmorillonite clay, a soil ingredient used to make bricks, with polymer materials.
(OTCBB: PTAM), a mining company involved in Montmorillonite extraction, has added Roger Haskins to its advisory board.
Two commercial clays were used as LN in the concentration of 0.5 wt%: natural montmorillonite (Cloisite Na, abbreviated MNa) and Bentonite for water systems (BW).
However, clays rich in montmorillonite, such, as those of Akim Asubua (near Caana), Akim Abenase and Adwaso I (mile 42) do not display this feature in which CEC varies with pH.
The new film combines particles of montmorillonite clay, a soil ingredient used to make bricks, with a variety of polymer materials.
Bentonite is a rock formed of highly colloidal and plastic clays composed mainly of montmorillonite, a clay mineral of the smectite group and is produced by in situ devitrification of volcanic ash.