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Bentonite, Kaolin and Selected Clay Minerals (EHC 231, 2005)

1 SUMMARY 11 Identity, physical and chemical properties, and analytical methods 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 In addition to montmorillonite, bentonite may contain feldspar, cristobalite, and crystalline quartz...

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