Answers are grounded in this paper and cite their sources.
Summary Adsorption isotherms for K on to Ca montmorillonite (< 2 μm and < 0.1 μm. e.s.d. fractions) at ionic strengths from 3 × 10 −2 M to 3 × 10 −5 M have been analysed by the methods of Van Bladel and Laudelout (1967) and show that negatively charged sites in the lamellae of both size fractions are the same but when these lamellae are intermeshed in crystals, potassium is favoured, probably in wedge sites between adjacent lamellae. The effectiveness of these wedge sites is lost at zero ionic strength.
No takes yet. Share an insight, caveat, or question.
Lee et al. (1975) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: