Cation exchangers with several groups of sites. Validity of theoretical bases

Abstract

The bases of exchange equilibria are given for an exchanger such as a zeolite in which there may be a number of crystallographically distinct kinds of cation site, some or all of which are occupied by the exchangeable cations A⁺ and B⁺, the cations of all site groups being intimately mixed throughout the crystal. It is shown that criticisms so far made of the thermodynamic aspects of the treatment are unjustified.