Cation And Network Structure In Binary Potassium Borate Glasses

XFAS studies of network modifying cations in alkali borate glasses have made an important contribution to the understanding of the structure of glass. Using a laboratory XAFS facility, the local structure in K2O-B2O3 glasses has been determined in order to elucidate the environment of network modifying K+ ions. The average coordination umber, Nk-o, of oxygen around K+ cations and the mean distance, Rk-o, for K-O correlations are found to be approximately 6 and 2.83-2.86 A, respectively. The XAFS results are in good agreement with X-ray diffraction and MD simulation results.