Abstract
Aluminosilicate glasses containing H2O (NaAlSi3O8·1.88H2O, Na0.57Al0.57Si3.43O8·1.69H2O, Ca0.38Al0.77Si3.23O8·1.71H2O) were synthesized by the hydrothermal method, and their structures were studied by the X-ray diffraction method. All of these glasses have TO4 (T = Si, Al) tetrahedra as basic structure units like in anhydrous aluminosilicate glasses. However, shapes of correlation functions are different from those of the corresponding anhydrous ones in the longer range than 3.5Å. Main structural changes induced by the addition of H2O are breakdown of linkage of TO4 tetrahedra to form clusters.
