Structural analysis of Na 2OGa 2O 3SiO 2 glasses by the X-ray diffraction method

Abstract

The structure of Na 2OGa 2O 3SiO 2 glasses of four different compositions containing up to 45 mol. % Ga 2O 3 has been determined by the X-ray diffraction method. The radial distribution function D( r) obtained indicates that Ga 3+ ions are in fourfold coordination and GaO 4 tetrahedra are formed in these glasses. The reduced intensity function S· i( S) and radial distribution function D( r) which were calculated based on a structural model for A-25, 0.25(Ga 2O 3)·0.75(Na 2O·2SiO 2)/3 glass agreed well with the observed ones.