PRE-RESONANT RAMAN-SPECTROSCOPY AND LOW-F REQUENCY INELASTIC-SCATTERING IN LEAD, ZINC AND BARIUM METAPHOSPHATE GLASSES DOPED WITH THE ION EU3+

An investigation of low-frequency inelastic scattering (LOFIS) and pre -resonant Raman spectroscopy has revealed the role of the modifying ca tions, Ba2+, Zn2+ and Pb2+ on the bonding properties of the Eu-O bond in Ba(PO3)2, Zn(PO3)2, and Pb(PO3)2 glasses. Analysis of the results h as shown that the electronegative character of the Pb2+ ions and the i onic radii of the Ba2+ and Zn2+ ions play a major role in the short-ra nge order of the metaphosphate glasses. Furthermore, it was shown, usi ng LOFIS, the influence of the modifying cations on the size distribut ion of the structural units found in the metaphosphate glasses.