The Heterogeneity of the Charge Density in Montmorillonites

M. S. Stul and W. J. Mortier
Centrum voor Oppervlakte- en Kolloidale Scheikunde, de Croylaan 42, B-3030 Heverlee, Belgium

Abstract: The heterogeneity of the interlayer cation density and the corresponding mean layer charge density due to isomorphous substitution have been determined for six montmorillonite samples. This has been achieved by considering the transition of a monolayer to a double layer complex with alkylammonium ions. The transition is related to the interlayer cation density, together with the variation of the apparent spacings, which in turn is related to the composition of this two-component mixture.

All the samples showed a heterogeneous interlayer cation distribution and a differing mean charge density.

Clays and Clay Minerals; December 1974 v. 22; no. 5–6; p. 391-396; DOI: 10.1346/CCMN.1974.0220505
© 1974, The Clay Minerals Society
Clay Minerals Society (www.clays.org)