Abstract
We analyse the manner in which local atomic structure affects the identification ofBi valence states in the x-ray absorption near-edge structure (XANES) of theBi L3 edge, by comparingsimulations of the Bi L3 edgesin various polymorphs of Bi2O3, NaBiO3 and Ag25Bi3O18. We find that while the XANES is certainly sensitive to the ionicity of Bi, it is betterdescribed in terms of its sensitivity to the local bond lengths and coordination associatedwith the valence states of Bi.
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