Investigation of the processes of iron-ion recharging on surfaces of natural nanoclays (Based on Mössbauer spectroscopy data)

Local Environments in Iron-Bearing Clay Minerals by DFT Approaches: The Case of Structural Fe in Kaolinite

“…In particular, 57 Fe Mössbauer spectroscopy is a perfect tool to study raw kaolins, considering that Fe is known to occur in them as the main impurity into the kaolinite host lattice and also in the accessory clay minerals. Investigations have used the high sensitivity of the Mössbauer spectroscopy to learn about the local environments of iron in kaolins, and also as a tool to study the materials through properties that depend on the structural Fe vicinity (St. Pierre et al, 1992;Castelein et al, 2002;Hart et al, 2002;Soro et al, 2003;Sei et al, 2004;Scorzelli et al, 2008;Andji et al, 2009;Silva et al, 2009;Santos et al, 2012;Zalutskii, 2014;Gonçalves et al, 2020). Mössbauer spectroscopy allows the determination of the isomer shift (IS) and the quadrupole splitting (QS).…”