Vibrational spectra of activated rei of wolframile-phosphate glasses

The vibrational spectra of wolframile-phosphate glasses with a high concentration of WO ₂ ²⁺ and Ln³⁺ ions were investigated and the structure of these glasses was analized. It is shown that the investigated glasses are formed predominantly by chain polyphosphates. Tungstate enters into the net of the glass in octahedral coordination, “stitching” the polyphosphate chains together but not isomorphously substituting phosphorus. In the glass structure nonlinear wolframile groups with the multiple tungsten-oxygen bonds are formed. The introduction of lanthanide oxides into the glass composition causes the average degree of its polymerization to decrease. F. Skorina Gomel' State University, 104 Sovetskaya St., Gomel', 246699, Belarus. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 64, No. 2, pp. 236–241, March–April, 1997.