A new approach to estimate refractive index, electronic polarizability, and optical basicity of binary oxide glasses

In this paper, we introduce the optical electronegativity Delta chi 1(glass)* to predict basic properties of binary oxide glasses. Optical electronegativity Delta chi 1(glass)* of numerous binary oxide glasses has been evaluated on the basis of two different properties: the linear refractive index n and energy gap E-g, which have demonstrated remarkable correlation. Furthermore, we also calculate the refractive index n through the energy-gap-based optical electronegativity Delta chi(E)*, and obtain a perfect linear correlation between the calculated refractive index n(cal) and the n(0) values of Dimitrov and Komatsu. The average electronic oxide polarizability alpha(o2-) and the optical basicity Lambda of binary oxide glasses have been estimated on the basis of the optical electronegativity Delta chi 1(glass)* calculated from the refractive index n. The estimated values are in good agreement with the available experimental data. The present method needs only one original experimental parameter to estimate the optical electronegativity Delta chi 1(glass)*, which is the refractive index n. (C) 2008 Elsevier B.V. All rights reserved.