EGU2020-20142
https://doi.org/10.5194/egusphere-egu2020-20142
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

XPS-like evaluation of valence-to-core X-ray emission spectra of germanates

Georg Spiekermann
Georg Spiekermann
  • University of Potsdam, Institute of Geosciences, Mineralogy, Potsdam, Germany (geospiek@uni-potsdam.de)

With this work, we aim at exploring the extent to which valence-to-core X-ray emission spectroscopy (vtc-XES) can provide this first- and second-coordination-shell information from amorphous germanium oxides.

We measured the vtc-XES spectra of germanium oxides at ambient and high pressure. The Kbeta’’ emission line, part of the vtc-XES spectra, is sensitive to coordination and oxygen-germanium bond distance as first coordination shell effects. Furthermore, it reflects the different binding energies of bridging and non-bridging oxygen atoms. The Kb’’ emission line may thus allow for tracking the coordination and the state of polymerization of a germanium oxide glass under pressure in diamond anvil cells or in other confining environments.

 

Spiekermann et al. (2019) Persistent octahedral coordination in amorphous GeO2 up to 100 GPa revealed by Kbeta'' X-ray emission spectroscopy, Physical Review X, 9, 011025.

How to cite: Spiekermann, G.: XPS-like evaluation of valence-to-core X-ray emission spectra of germanates, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-20142, https://doi.org/10.5194/egusphere-egu2020-20142, 2020

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