The effect was studied of water vapor pressure on the shifting of the x-ray basal reflection d001 of montmorillonite [1318-93-0] as a function of the content of (Ca + Mg) and (Na + K) cations in the interlayer sheet. The ratio [(Na + K)/(Ca + Mg)] = 1/3, behaves as a limiting value; at this ratio <1/3, montmorillonites behave as if the interlayer space was composed of divalent cations and at >1/3 as though they were monovalent cations.
Behavior of natural montmorillonites at suitable water vapor pressure / Alietti, Andrea; Brigatti, Maria Franca. - In: MINERALOGICA ET PETROGRAPHICA ACTA. - ISSN 0540-1437. - STAMPA. - 23:(1979), pp. 145-150.
Behavior of natural montmorillonites at suitable water vapor pressure
ALIETTI, Andrea;BRIGATTI, Maria Franca
1979
Abstract
The effect was studied of water vapor pressure on the shifting of the x-ray basal reflection d001 of montmorillonite [1318-93-0] as a function of the content of (Ca + Mg) and (Na + K) cations in the interlayer sheet. The ratio [(Na + K)/(Ca + Mg)] = 1/3, behaves as a limiting value; at this ratio <1/3, montmorillonites behave as if the interlayer space was composed of divalent cations and at >1/3 as though they were monovalent cations.
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