IR and NMR studies of the structure of glasses based on gallium and indiumtrifluorides

Glasses based on gallium and indium trifluorides are investigated by IR and F-19 NMR spectroscopy An analysis of the IR data showed that the octahedra l complexes [GaF6](3-) and [InF6](3-) are the main structural units of thes e glasses; the nets of indium and gallium glasses differ in the order of bi nding between the glass-forming complexes. An analysis of NMR data also rev ealed considerable differences in the structure of these glasses as judged by the effect of the type of alkaline cation on the state of the fluoride s ubsystem. The gallium net is a three-dimensional net consisting of octahedr al complexes linked by three edges (uniform conjunction); the indium net ha s a nonuniform conjunction - by two edges and two vertices.