Bentonite ni minerval idafite ubutare hamwe na montmorillonite nkibigize imyunyu ngugu.Imiterere ya montmorillonite nuburyo bwa 2: 1 bwa kirisiti igizwe na tetrahedron ya silikoni ebyiri ya silikoni hamwe na octahedron ya aluminium.Hano hari cations zimwe na zimwe, nka Cu, Mg, Na, K, muburyo butandukanye bwakozwe na selile ya montmorillonite, kandi imikoranire iri hagati yutwo turemangingo na montmorillonite ya kirisiti ntigihungabana cyane, byoroshye guhanahana nizindi cations Ifite umutungo mwiza wo guhana.Ibihugu by’amahanga byakoreshejwe mu mashami arenga 100 mu bice 24 by’inganda n’ubuhinzi, hamwe n’ibicuruzwa birenga 300, bityo abantu bakabyita "ubutaka rusange".

Bentonite ifite amanota menshi nka:Ibumba rikora, Ubutaka busanzwe bwo guhumanya, Organic bentonite, ubutare bwa Bentonite, Kalisiyumu bentonite na sodium bentonite.