SNO2-type solid solution formation studied by IR spectroscopy

SnO2 type solid solution formation in the Sn-Sb-Cu-O system was studied by IR spectroscopy. The study was intended to bring information concerning the way the inclusion of substituents in high quantities (40 mol %) in the SnO 2 lattice takes place, The obtained SnO2 type solid solution presents very well-defined X-ray diffraction patterns but an abnormal transmission decrea se in the 1000-200 cm(-1) wave number domain and the typical pure oxide ban ds disappearance. The phenomenon might be assigned to the increase of the c harge carrier concentration, which might shield IR spectra.