Solid state characterization of oxidized actinides co-crystallized with uranyl nitrate hexahydrate

Einkauf, Jeffrey D.; Burns, Jonathan D.

doi:10.1039/C9DT04000E

Solid state characterization of oxidized actinides co-crystallized with uranyl nitrate hexahydrate

Journal Article · Mon Dec 16 00:00:00 EST 2019 · Dalton Transactions

DOI:https://doi.org/10.1039/C9DT04000E· OSTI ID:1600514

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Texas A & M Univ., College Station, TX (United States); Texas A&M University
Texas A & M Univ., College Station, TX (United States)

Characterization of the penta- and hexavalent dioxo cations of NpO₂⁺, NpO₂²⁺, PuO₂²⁺, and AmO₂²⁺ has been carried out by diffuse reflectance UV-Vis-NIR spectroscopy, with the first observations of NpO₂⁺, NpO₂²⁺, and AmO₂²⁺ in the solid state. Absorbance measurements confirmed the presence of the higher actinides of Np, Pu, and Am, with shifts in their absorbance bands indicating the formation of the dinitrate species in the crystalline phase. The oxidized actinides were prepared in the solid state by co-crystallization with UO₂(NO₃)₂·6H₂O by a simple reduction in temperature. The hexavalent species were all co-crystallized in near proportion to UO₂²⁺ and the pentavalent species was co-crystallized in a slightly less efficient manner, roughly 83% of that of UO₂²⁺.

View Accepted Manuscript (DOE)

Research Organization:: Texas A & M Univ., College Station, TX (United States)

Sponsoring Organization:: USDOE Office of Nuclear Energy (NE)

Grant/Contract Number:: NE0008653

OSTI ID:: 1600514

Alternate ID(s):: OSTI ID: 1580765

Journal Information:: Dalton Transactions, Journal Name: Dalton Transactions Journal Issue: 3 Vol. 49; ISSN 1477-9226; ISSN ICHBD9

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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