Evolution of local structure in Ag 2O–TeO 2 glasses with addition of Ag 2O analyzed by pulsed neutron diffraction and Raman spectroscopy

Abstract

The local structure of Ag 2O–TeO 2 glasses was studied by time-of-flight pulsed neutron diffraction (TOF-PND) and Raman spectroscopy. The results of Raman spectroscopy indicated that TeO 4 trigonal bipyramidal units (tbp) were converted to TeO 3 trigonal pyramidal units (tp) by addition of Ag 2O to TeO 2. Furthermore in PND, the structural parameters for each atomic pair were optimized in the Q-space, and the distances of the near neighbor Te–O correlations forming tbp units and tp units in the network were estimated with some accuracy.