Network structure of M2O–TeO2 (M=Li, Na, Li0.62Na0.38) glasses

Abstract The network structures of x M 2 O–(100− x )TeO 2 (M=Li, Na, Li 0.62 Na 0.38 ) ( x =10, 25, 33 mol%) glasses prepared by melt quenching were studied by X-ray and neutron diffraction. The partial correlation functions for network frameworks have been calculated using the Reverse Monte Carlo (RMC) method. As a result, it was found that Te–Te correlation does not change with increasing alkali content. The RMC result supports recent reported observation that the units of TeO 4 trigonal bipyramid decrease by addition of alkali oxide, while the units of TeO 3 trigonal pyramid increase.