The use of the FEFF8 code to calculate the XANES and electron density of states of some sulfides

The FEFF8 was used to calculate x-ray absorption spectra (XANES) and the lo cal partial electron density of states (LDOS) for several sulfides: InPS4 ( twice defective chalcopyrite), CdIn2S4 (normal spinel) and Tl3AsS3 (space g roup R3m). The calculated XANES are compared with experimental spectra. The self-consistent MT-potentials found for clusters of about 35 atoms were us ed to calculate XANES and LDOS for clusters of 87 atoms in the approach of full multiple scattering. In all cases the agreement of the simulated XANES and experimental ones is quite good. The theoretical LDOS agree well with the experimental x-ray emission K- and L-2,L-3-spectra.