Raman spectra study on the GeS₂-Ga₂S₃-KCl system glasses

Raman spectra of GeS₂-Ga₂S₃-KCl pseudo-ternary system glasses at room temperature in the air were probed systematically in the region of 150-500 cm^-1. Based on the results of Raman spectra and preparing procedure in pseudo-binary systems GeS₂-KCl and Ga₂S₃-KCl, the sole interaction of Ga₂S₃ and KCl was identified and new units GaS_3/2Cl were produced in GeS₂-Ga₂S₃-KCl glasses. That K⁺ ions in the form of Cl as the nearest coordination were homogeneously dispersed in the polymeric network was confirmed by the Raman spectra evolution of samples on the serials I and III. Raman spectral evolution of three composition serials can be successfully interpreted using a localized model considering the effect of K⁺ ions on the structural units GaS_3/2Cl and Ga₂S₄Cl₂.