Abstract
The (001) reflections of Ni- and Cu-montmorillonite after dehydration at 200° to 600°C in vacuum are presented. d001 values of both the vacuum treated samples were measured after exposing them to water and ethylene glycol for 3, 5, 15 and 25 days. The vacuum-treated samples were further subjected to H2 atmosphere at the same temperatures (200°–340°C) and exposed to the two liquids and then the XRD study was carried out. The results have been interpreted in terms of Hofmann-Klemen effect and sluggish swelling of the mineral.
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