Microstructural Study On the GeS_2-Ga_2S_3-CsCl Glasses

Raman spectra of GeS2-Ga2S3-CsCl pseudo-ternary glasses at room temperature in the air were probed systematically in the 150-500cm-1 region. Based on the evolution of Raman spectra and preparing procedure in pseudo-binary systems GeS2-CsCl and Ga2S3-CsCl, the sole interaction of Ga2S3 and CsCl was identified and the formation of new units GaS3/2Cl was verified in GeS2-Ga2S3-CsCl glasses. That Cs+ ions in the form of Cl as the nearest coordination are homogeneously dispersed in the polymeric network was confirmed by the Raman spectra evolution of samples on two serials. Raman spectral evolution of two composition serials can be successfully interpreted by using a localized model considering the effect of Cs+. ions on the structural units GaS3/2Cl and Ga2S4Cl2.