Abstract
An extensive search of the literature was made for ion exchange data on smectites. The data, in the form of ion exchange equilibrium constants and free energies of exchange, have been tabulated and evaluated. Equilibrium constants describing monovalent-monovalent and monovalent-divalent types of exchange for the same reaction on the same type of smectite were found to differ by as much as an order of magnitude. While some of the difference can be attributed to variance in experimental procedures, much of the difference appears due to differences in charge densities and effective field strengths of the smectites, which are in turn related to the amount and type of substitution on intercrystalline octahedral and tetrahedral sites.
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Benson, L.V. A tabulation and evaluation of ion exchange data on smectites. Geo 4, 23–29 (1982). https://doi.org/10.1007/BF02380496
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DOI: https://doi.org/10.1007/BF02380496