Structural chemistry of NaAlGe₃O₈-KAlGe₃O₈ feldspar glasses

Abstract

Structures of NaAlGe3O8-KAlGe3O8 feldspar glasses were investigated by using X-ray diffraction measurement, infrared spectroscopy. Structure parameters such as T-O and T-T distances (T=Al/Si) were obtained by radial distribution function analysis based on observed X-ray diffraction intensities. Observed densities of glasses were decreased with increasing K2O content. This density change is correlated with both short and medium range structure of glasses.