Analysis of EXAFS data of complex systems

Analysis of EXAFS data of complex systems containing more than one phase and one type of coordination, has been discussed. It is shown that a modified treatment of EXAFS function as well as the amplitude ratio plots provide useful means of obtaining valuable structural information. The systems investigated are: biphasic Ni+NiO mixture, NiAl₂O₄ with two coordinations for Ni, NiO+NiAl₂O₄ mixture, CoS+CoO system and Ni dispersed on Al₂O₃. The results obtained with these systems have been most satisfactory and serve to illustrate the utility and the applicability of the innovations described in this paper.Contribution No. 522 from Solid State and Structural Chemistry Unit