Changes in the structure of synthetic hydrosodalite during dehydration

Abstract

1. A noticeable decrease in the parameter of the crystal unit cell, representing 2.6%, is observed as the result of the limiting adsorption of water on dehydrated hydro sodalite. 2. A more than one order of magnitude smaller and opposite change in the parameter of the unit cell in the limiting adsorption of water on zeolite NaA serves as indirect evidence of the unavailability of the small cavities of zeolite NaA at 20° for adsorbed water molecules.