The local structure around Ge in xLi2O-(1 - x)GeO2 (x = 0, 0.17, 0.20, 0.24) glasses was investigated using AXS and EXAFS measurements. The averaged coordination number of the first nearest Ge-O pair increased with increasing Li2O content up to 24 mol% and the amount of six-coordinated Ge was proportional to Li2O content. The introduction of a GeO6 unit is suggested to be one of the most fundamental structural changes accompanying the so-called germanate anomaly detected in density measurements of alkali-germanate glasses.
|Number of pages||5|
|Journal||Journal of Mineralogical and Petrological Sciences|
|Publication status||Published - 2015|
- Anomalous X-ray scattering
- Lithium germanate glass
- Local structure