Investigation of structure of GeS1.35 glasses with the use of isotopically enriched germanium and Raman scattering spectroscopy

Abstract The samples of GeS 1.35 glasses were synthesized with germanium and sulfur of natural isotopic composition and with isotopically enriched germanium ( 72 Ge, 74 Ge, 76 Ge). The glasses were investigated by the method of Raman scattering spectroscopy (RSS). It was shown that GeS 4/2 tetrahedrons and structural units containing Ge Ge homobonds are present in glasses. The quantum-mechanical calculation of the frequency of fundamental vibrational modes in glass network was carried out. Their dependencies on the atomic mass of germanium were used for identification of bands in RS (Raman scattering) spectra.