| Germanate glasses containing oxides of heavy metals such as PbO, Bi2O3, have been studied for many years due to their interesting optical and electrical properties. We have investigated the structure of lead-germanate glasses using combined EXAFS (extended X-ray absorption fine structure) and MD (molecular dynamics) methods. We describe the local structure around lead atoms and its changes as the function of glass composition. The obtained results are compared with data provided by other authors. We have shown that combined usage of EXAFS and MD analysis (in the framework of the GNXAS approach) could be a source of detailed information on the short-range order in disordered materials. |
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