STRUCTURE AND OPTICAL CHARACTERISTICS OF GLASSES IN THE TeO2-BaO-Bi2O3-B2O3 SYSTEM

A series of glasses in the BaO-TeO2-Bi2O3-B2O3 system, was prepared by melt quenching technique. The amorphous nature of the obtained glasses was confirmed by X-ray powder diffraction analysis. The experimental densities were found to be in the range 5.170 to 5.831 g cm-³. Key structural parameters, including molar volume, oxygen packing density, optical basicity, interionic interaction parameter, and single bond strength, were evaluated to understand the compositional effects on the glass network. Structural characterization using infrared and Raman spectroscopy further elucidated the bonding and vibrational features of the glasses. The refractive indices were measured experimentally and compared with theoretical values calculated using the polarization approach, revealing a strong correlation between experimental and theoretical results.