Structural studies of xLi2O-(40-x)Bi2O3-20CdO-40B2O3 glasses

Raman and infrared spectroscopies have been employed to investigate the xLi(2)O-(40-x)Bi2O3-20CdO-40B(2)O(3) glasses in order to obtain information about the competitive role of Bi2O3 and B2O3 in the formation of glass network. IR and Raman spectra show that these glasses are made up of [BO3], [BO4] and [BiO3] Pyramidal and [BiO6] octahedral units. The formation of CdO4 in tetrahedral co-ordination was not observed. The optical absorption studies revealed that the cut-off wavelength decreases while optical band gap energy (E-opt) increases. The average electronic polarizability of the oxide ion (alpha(O2-)), optical basicity Lambda(E-opt), and Yamashita-Kurosawa's interaction parameter A(E-opt) were also examined. (C) 2013 The Authors. Published by Elsevier B.V. All rights reserved.