VIBRATIONAL AND ELECTRONIC-SPECTRA OF SOME MIXED OXIDES BELONGING TO THE SR2PBO4 STRUCTURAL TYPE

Fourier transform infrared and electronic reflectance spectra of the m ixed oxides Ca2PbO4, Sr2PbO4 and Cd2SnO4 were recorded and an approxim ate assignment for some of the M(IV)-O vibrations proposed with the ai d of a site symmetry analysis. The electronic spectra were interpreted theoretically using self-consistent field X alpha calculations, which allowed a straightforward interpretation of the observed transitions and spectral differences.