Glass formation, crystallization ability, physicochemical properties, and spectral characteristics of glasses of the GeO 2 - TeO 2 - B 2 O 3 - PbO. The structural features of glasses are investigated and the coordination transitions of boron and germanium ions in their structure are revealed. A nonlinear dependence of the physicochemical properties of glasses on their composition and structure, interpreted by the manifestation of "borate and germanate" anomalies in glasses, has been established. Optical absorption spectra of glasses are characterized by a steep fundamental absorption edge at the border of the visible and UV regions of the spectrum, which allows them to be recommended for use as light filters that cut off the UV region. Il. 5, bibliography: 14 titles.
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