Bentonite ndi mchere wopanda chitsulo wokhala ndi montmorillonite monga gawo lalikulu la mchere.Mapangidwe a montmorillonite ndi mawonekedwe a kristalo amtundu wa 2: 1 wopangidwa ndi ma silicon oxygen tetrahedron ophatikizidwa ndi wosanjikiza wa aluminium oxide octahedron.Chifukwa mawonekedwe osanjikiza opangidwa ndi cell ya montmorillonite ali ndi ma cations, monga Cu, Mg, Na, K, etc., ndipo ntchito ya ma cations okhala ndi cell ya montmorillonite ndi yosakhazikika, yosavuta kusinthanitsa ndi ma cation ena, ili ndi ion yabwino. kusintha luso.Kumayiko ena, idagwiritsidwa ntchito m'madipatimenti opitilira 100 m'magawo 24 opanga mafakitale ndi ulimi, ndi zinthu zopitilira 300, chifukwa chake anthu amachitcha "nthaka yapadziko lonse lapansi".

Bentonite imadziwikanso kuti bentonite, bentonite, kapena bentonite.China ili ndi mbiri yakale yopanga ndi kugwiritsa ntchito bentonite, yomwe poyamba inkagwiritsidwa ntchito ngati chotsukira.Panali migodi yotseguka m'dera la Renshou ku Sichuan zaka mazana ambiri zapitazo, ndipo anthu am'deralo ankatchula bentonite ngati ufa wadongo.Amagwiritsidwa ntchito kwambiri koma ali ndi mbiri ya zaka zoposa zana limodzi.Kupezeka koyamba ku United States kunali kudera lakale la Wyoming.Dongo la chartreuse limatha kukula kukhala phala pambuyo powonjezera madzi.Pambuyo pake, anthu adatcha dongo lonse ndi katundu uyu bentonite.M'malo mwake, mchere waukulu wa bentonite ndi montmorillonite, wokhala ndi 85-90%.Zina za bentonite zimatsimikiziridwa ndi montmorillonite.Montmorillonite ikhoza kukhala yamitundu yosiyanasiyana, monga yobiriwira yachikasu, yachikasu yoyera, imvi, yoyera, ndi zina zotero. Ikhoza kupanga midadada wandiweyani kapena dothi lotayirira, ndi kumverera koterera pamene kukuta ndi zala.Pambuyo powonjezera madzi, kuchuluka kwa midadada yaying'ono kumakula kangapo mpaka nthawi 20-30, kuwonekera mumadzi oyimitsidwa m'madzi, komanso m'malo ophatikizika pakakhala madzi pang'ono.Chikhalidwe cha montmorillonite chimagwirizana ndi kapangidwe kake kake ndi kapangidwe ka mkati.