Furthermore, all the Raman spectra of the glasses containing Ti present a shoulder at 873 cm1, whose absorption might be due to stretching vibrations of Ti–O–Ti bridges of TiO4, as it has been reported in several works [19–21].
Furthermore,all the Raman spectra of the glasses containing Ti presenta shoulder at 873 cm1, whose absorption might be due tostretching vibrations of Ti–O–Ti bridges of TiO4, as it has been reportedin several works [19–21].