On the Structure of Glasses
in the GeSBr and GeSeBr Systems

N. I. Krylov

St. Petersburg State Polytechnical University, ul. Politekhnicheskaya 29, St. Petersburg, 195251 Russia

e-mail: mikhail@ftim.spbstu.ru

Received October 28, 2009

Abstract—The structure of the vitreous GeSBr₂ and GeSeBr₂ compounds has been investigated using Raman
scattering spectroscopy. The Raman spectra of the GeSBr₂ compound contain bands at 235 and 113 cm^–1, which
are attributed to vibrations in the GeBr₄ molecule, and bands at 288, 254, 161, and 147 cm^–1, which are absent
in the Raman spectra of binary compounds. The Raman spectrum of the GeSeBr₂ glass has common features
with the spectra of the GeSe₂ and GeBr₄ compounds but also involves a number of new bands intermediate in
position between the bands at 265 cm^–1 for the GeSe₂ compound and the bands at 325 cm^–1 for the GeBr₄ com-
pound. The spectra obtained confirm the existence of equilibria between the formation and dissociation of ter-
nary structural units in melts of the thiobromide and selenobromide systems.

DOI: 10.1134/S1087659610020057

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