Abstract
A series of 0.45BaO-0.05Al(2)O(3)-0.5P(2)O(5) glasses doped with V2O5 were prepared. The glass sample containing 1.0% V2O5 exhibited bandpass filters in the photon wavelength ranges of 236-324 nm, 412-482 nm and 682-1500 nm. The phosphate structural units are Q(2) linked to AlO6, BaO6, and O(3)V1/4O structural units. The optical band gap, E-g, values decreased from 2.253 eV (the base) to 1.968 eV (2.5% V2O5), whereas the refractive index was calculated from the E-g values, which increased from 2.596 (the base) to 2.703 (2.5% V2O5). The glass density, r, decreased as the V2O5 content increased from 2.744 g/cm(3) to 2.307 g/cm(3), and the molar volume, V-m, was calculated from the r. The molar refraction, Rm, and polariz-ability, am, were calculated from the refractive index and V-m. The optical basicity, L, of the glass was discussed in terms of its thermodynamic stability. (C) 2022 The Author(s). Published by Elsevier B.V.