Conclusions 1. From our infrared absorption studies we can place the montmorillonites saturated with various cations (ea++, Mg++, Li+, K+, Ba++, H+, Xa+, and XI&+) into four classes with respect to water uptake. The first class, one of extreme absorption, consists of the Ca++ and Mg++ montmorillonites. The second, of appreciable absorption, consists of the Li+, K+, and Ba++ montmorillonites; and the third class, H+ and Na+ montmorillonites, was ...
