Montmorillonite-Salt Interactions at 550°C

I. M. Natale1 and A. K. Helmy
Universidad Nacional del Sur, 8000 Bahía Blanca, Argentina
1 Investigadora Comisión de Investigaciones Científicas de la Provincia de Buenos Aires, Departamento de Agronomía. Universidad Nacional del Sur.

Abstract: The reactions between montmorillonite and carbonates and hydroxides of Na, K and Li were studied at 550°C as a function of salt content and time. The reactions were found to be rapid with a half-time of 20–30 minutes. Good agreement was obtained between theoretical and experimental stoichiometric values for the clay-carbonate reaction. The 001 and 02,11 reflections of the products of the clay-salt reactions diminished in intensity and/or disappeared at and above the stoichiometric concentrations of the reactants.

Key Words: Carbonates • Hydroxides • Montmorillonite • Solid-state reaction

Clays and Clay Minerals; April 1992 v. 40; no. 2; p. 206-211; DOI: 10.1346/CCMN.1992.0400210
© 1992, The Clay Minerals Society
Clay Minerals Society (www.clays.org)