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Updated: Aug 14, 2026

High Resolution Physical Characterization of Single Metallic Nanoparticles
Published on: June 28, 2019
First structural characterization of a protactinium(V) single oxo bond in aqueous media
Claire Le Naour1, Didier Trubert, Maria V Di Giandomenico
1Centre National de la Recherche Scientifique/IN2P3/Paris XI, Institut de Physique Nucléaire, 91406 Orsay Cedex, France.
Abstract:
The present work describes the first structural studies of protactinium(V) in sulfuric and hydrofluoric acid media using X-ray absorption spectroscopy. The results show unambiguously the absence of the trans-dioxo bond that characterizes the other early actinide elements such as U and Np. In concentrated sulfuric acid (13 M), Pa(V) is proved to exhibit a single oxo bond as postulated in the literature for species in more dilute media. In a 0.5 M HF medium, XANES and EXAFS spectra indicate the absence of any oxo bond: Pa(V) exists in the form of a pure fluoro complex.
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