Raman scattering studies of the GeS2-Ga2S3-CsCl glassy system

Room temperature Raman spectra of samples on four serials within GeS2-Ga2S3-CsCl glassy system have been investigated systematically. Based on the analysis of the local coordination surroundings of Cs+ ions, the similarities and changes of Raman spectra for glass Ga2S3-2CsCl and bridged molecular GaCl3 were explained successfully. With a profound consideration of the effect of Cs+ ions on mixed anion units (GaS4−xClx) and bridged units (Ga2S6−xClx) and the corresponding micro-structural model, the Raman spectral evolution of the samples within GeS2-Ga2S3-CsCl glassy system was reasonably elucidated.