Mössbauer study of dynamic and phase transitions in an aqueous film–nanoclay surface system

Resumo

Phase transitions in aqueous films adsorbed in clays are studied and reported for the first time. Analysis of spectral parameters allows the orto/spin-isomer pair ratio in frozen water to be established, and the Mössbauer probes to be localized on the alumosilicate surface. The temperature transformation of the spectra is explained using models that qualitatively describe first- and second-order phase transitions.