Abstract
Molecular mechanics simulations using the Cerius 2 modeling environment have been applied to study the structures of dioctahedral smectites intercalated with the zirconium cation [Zr 4(OH) 12(H 2O) 12] 4+. The substitutions in the silicate layers influence the sublimation energy in these types of intercalated layer structures. Charge distribution in the smectite layer was analyzed in relation to the interlayer structure. Tetrahedral substitutions in the smectite layer create preferential interlayer positions of the [Zr 4(OH) 12(H 2O) 12] 4+ ion. A regular distribution of the tetrahedral substitutions in the smectite layer results in a better intercalant ordering in the interlayer space. Such a more homogeneous intercalant distribution results in a better interlayer pore size control.
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