X-RAY PHOTOELECTRON-SPECTRA OF THE SPINEL SYSTEMS CDCRXIN2-XS4 AND ZNCRXAL2-XS4

XPS spectra of CdCrxIn2-xS4 and ZnCrxAl2-xS4 spinel solid solutions are reported. A nearly constant electron density is found over all atomic sites in both series in the whole range of concentration x; this situation is related to covalency. Some interesting features in the Cr3s multiplet splitting are discussed.