Raman study of xMeO·(100−x)[P2O5·Li2O] (MeO⇒Fe2O3 or V2O5) glass systems

Abstract Glasses from x MeO·(100 − x )[P 2 O 5 ·Li 2 O] (MeO ⇒ Fe 2 O 3 or V 2 O 5 ) systems, with 0 ≤ x ≤ 50 mol%, were prepared and investigated by Raman spectroscopy. The influence of Fe 2 O 3 and V 2 O 5 content on the structure of P 2 O 5 ·Li 2 O glass matrix was followed. The P 2 O 5 ·Li 2 O glass matrix presents three absorption bands characteristic to metaphosphate chain structures. The addition of Fe 2 O 3 or V 2 O 5 determines the modification of the structure of the studied glasses. The Raman spectra of x Fe 2 O 3 ·(100 − x )[P 2 O 5 ·Li 2 O] do not present any absorption bands characteristic to Fe 2 O 3 but its evolution is dependent on the iron content. The Raman spectra of x V 2 O 5 ·(100 − x )[P 2 O 5 ·Li 2 O] present, besides the bands specific for the matrix, some bands assigned to characteristic vibrations of V–O bonds which are evidenced only for high content of V 2 O 5 . The evolution of the spectra is dependent of V 2 O 5 content.