QUANTITATIVE RAMAN INVESTIGATIONS OF THE STRUCTURE OF GLASSES IN THE SYSTEM B2O3-PBO

Glasses in the system xPbO.(100-x)B2O3 (0 less-than-or-equal-to x less -than-or-equal-to 75 mol%) have been studied by Raman spectroscopy. Th e conversion of boroxol rings into borate rings containing one or two BO4 groups due to the transformation of three fold to four fold co-ord inated boron with increasing lead oxide content is determined quantita tively from the intensities of the Raman peaks at 805 and 770 cm-1. Th e low frequency parts of the Raman spectra supply information on the s tructure of the incorporated lead oxide polyhedra. The position of bos on peaks in the temperature reduced spectra enables short range order to be determined by means of the Martin & Brenig model.