Germanium Kα _1,2 Shifts Due to Coordination

Abstract

The K α 1,2 lines emitted from Ge in germanium oxide compounds showed energy shifts (∼0.07 eV) resulting from changes in the coordination state of Ge. Based on the results of high‐resolution X‐ray fluorescence spectrometry and theoretical calculations using the molecular orbital theory (DV‐ X α method), it was confirmed that fourfold‐coordinated Ge emits lower energy Kα 1,2 lines than sixfold‐coordinated Ge. Theoretical calculations show that this shift is caused by a change in the effective charge of Ge due to the number of nearest‐neighbor atoms.