Definition of "montmorillonite" [montmorillonite]

• Any of a group of soft, clay-like silicate minerals having many industrial and technical uses (noun)

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• "However, it is better and cheaper to try to find another native clay that can do the same job. bentonite: This is the commercial name for an extremely plastic clay also known as montmorillonite clay."
• "They serve here as illustrations of chemical changes taking place in the fired clay. montmorillonite: There are several other types of clay minerals, but we shall only discuss montmorillonite, which is often present in native clay along with kaolinite."
• "Bentonite, which is derived from volcanic ash, contains an ingredient called montmorillonite, a molecule of which is l/500th the size of a water molecule and carries a negative charge that is 200 times greater than its positive charge."