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.