XAFS STUDY OF THE MAIN CONSTITUENT ELEMENTS OF LAYERED ALUMINOSILICATES

Changes in the Si and Al K-edges XANES signals for a series of well ch aracterized phyllosilicates have been examined Results obtained for th e different specimens have been interpreted in accordance with the cha nges in the structural compositions of the minerals and with the resul ts of previous theoretical and experimental studies of related compoun ds. In both edges appear typical features that can be associated with dioctahedral and trioctahedral series.