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The primary features of the Raman and infrared spectra of AX₂ tetrahedral glasses are associated with the edges of the vibrational bands calculated by Sen and Thorpe. The dominant Raman peak is assigned to a singular matrix element rather than a peak in the density of vibrational states. Simple expressions are developed which yield useful values of the vibrational force constants and intertetrahedral angles for vitreous SiO₂, GeO₂, and BeF₂.
F. L. Galeener (Sun,) studied this question.
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