(redirected from Bentonites)
Also found in: Thesaurus, Medical, Encyclopedia.


An absorbent aluminum silicate clay formed from volcanic ash and used in various adhesives, cements, and ceramic fillers.

[After Benton Formation of the Rock Creek district in eastern Wyoming.]

ben′ton·it′ic (-nĭt′ĭk) adj.


(Geological Science) a valuable clay, formed by the decomposition of volcanic ash, that swells as it absorbs water: used as a filler in the building, paper, and pharmaceutical industries
[C19: from Fort Benton, Montana, USA, where found, + -ite1]


(ˈbɛn tnˌaɪt)

a porous clay that swells to several times its dry volume when absorbing water.
[1895–1900; after Fort Benton, Montana]
ben•ton•it•ic (ˌbɛn tnˈɪt ɪk) adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.bentonite - an absorbent aluminum silicate clay formed from volcanic ash
clay - a very fine-grained soil that is plastic when moist but hard when fired
References in periodicals archive ?
Smectitic clays, such as bentonites, are the most widely used in peloid therapy, because of their high specific surface area, ion exchange properties, plasticity, expansibility, absorbing capacity and spreadability.
Bentonites/Seacoal--packaged Sodium Bentonite, Calcium Bentonite, and high quality bituminous coals and lustrous carbon producers.
Commercial bentonites as detoxifier of broiler feed contaminated with aflatoxin.
The researchers concluded that their study confirms "the applicability of theoretical equations for evaluating the hydraulic conductivity of compacted bentonites and sand-bentonite mixtures, which have already been proposed in Komine (in 2008), by comparing calculated results and experimental results.
Calcium bentonites are non-swelling and break down to a granular substance that is used as an absorbent clay.
Bentonites are sedimentary rocks consisting clay minerals, such as montmorillonite (major constituent), beidellite, saponite, nontronite, hectorite, and nonclay minerals (3).
Bentonites are a clay raw material with strong colloidal characteristics that increase absorption and have high ion exchange capacity because of the presence of hydrated cations (Tiller, Gerth, & Brummer, 1984).
Bentonites clays are often classified into different types like Sodium, Aluminium, Calcium, and Potassium.
This expediency is also supported with existence of the considerable reserves of bentonites in fields in all territory of Ukraine [5].
Easily mixes and yields faster than most other bentonites.