Abstract

AbstractThe chemical stability of four Na‐saturated montmorillonites differing in their isomorphous substitution was studied by following the change of specific conductance, Na+ activity and pH of their aqueous suspensions at several clay concentrations. It was found that the change in specific conductance is proportional to the square root of time and that the proportionality constant is linearly related to the degree of octahedral substitution. Further, a linear relation exists between the change in specific conductance and the change in Na+ activity. A hypothesis to explain these observations is presented.

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