Abstract
Raman and nuclear magnetic resonance (NMR) spectra were measured for GaO3/2-TeO2 glasses. Compositional dependence of Raman band intensities reveals that the coordination state of tellurium changes from TeO4 trigonal bipyramid to TeO3+1 polyhedron and TeO3 trigonal pyramid. 71Ga magic angle spinning NMR spectra indicate that most of galliums form GaO6 octahedra in 10GaO3/2⋅90TeO2 glass and tetrahedral and octahedral galliums coexist in 30GaO3/2⋅70TeO2 glass. The change in coordination state of galliums depending on composition is discussed.
