Absence of higher than sixfold coordination in glassy GeO2 up to 158 GPa revealed by X-ray absorption spectroscopy

Proceedings of the National Academy of Sciences, Volume 122, Issue 49, December 2025. <br/>SignificanceThe compression behavior of amorphous binary oxides, including GeO2and SiO2, remains highly controversial, hindering any direct comparison of pressure-induced polyamorphic transitions in glasses and their crystalline counterparts, as well as …