Portions of the montmorillonite structure:


    Octahedral Sheet


    Tetrahedral Sheet


    Tetrahedral and Octahedral Sheets


    Tetrahedral, Octahedral, Tetrahedral Sheets


    K+, Tetrahedral, Octahedral, Tetrahedral, K+ Sheets


    Montmorillonite Layers (horizontal)

    Montmorillonite Layers (vertical)

    Coordinates for K0.58(Al,Mg)2(OH)2[(Si,Al)2O5]2 from S. I. Tsipursky and V. A. Drits Clay Minerals, 19, 177-193 (1984); S. W. Bailey (Ed.) "Hydrous Phyllosilicates," Reviews in Mineralogy, 19, (1988).

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