Title

Characterization of Pentavalent and Hexavalent Americium Complexes in Nitric Acid Using X-ray Absorption Fine Structure Spectroscopy and First-principles Modeling

Document Type

Article

Publication Date

1-1-2016

Publication Title

Journal of Radioanalytical and Nuclear Chemistry

Volume

309

Issue

3

First page number:

1087

Last page number:

1095

Abstract

The speciation of pentavalent and hexavalent americium (Am) complexes in nitric acid have been studied by X-ray absorption fine structure spectroscopy, UV–visible spectroscopy, and density functional theory. Calculated bond distances for the Am(VI) complex are in reasonable agreement with EXAFS data and suggest the presence of a mixture of AmO2 + and AmO2 2+ as well as a slightly higher kinetic stability for Am(VI) compared to Am(V). © 2016, Akadémiai Kiadó, Budapest, Hungary.

Keywords

Acidic solution; Americium; DFT; Higher oxidation states; XAFS

Language

English

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