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

Abstract

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+.

Authors:
ORCiD logo [1]; ORCiD logo [1]
  1. Texas A & M Univ., College Station, TX (United States)
Publication Date:
Research Org.:
Texas A & M Univ., College Station, TX (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1600514
Alternate Identifier(s):
OSTI ID: 1580765
Grant/Contract Number:  
NE0008653
Resource Type:
Accepted Manuscript
Journal Name:
Dalton Transactions
Additional Journal Information:
Journal Volume: 49; Journal Issue: 3; Journal ID: ISSN 1477-9226
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS

Citation Formats

Einkauf, Jeffrey D., and Burns, Jonathan D. Solid state characterization of oxidized actinides co-crystallized with uranyl nitrate hexahydrate. United States: N. p., 2019. Web. doi:10.1039/C9DT04000E.
Einkauf, Jeffrey D., & Burns, Jonathan D. Solid state characterization of oxidized actinides co-crystallized with uranyl nitrate hexahydrate. United States. doi:https://doi.org/10.1039/C9DT04000E
Einkauf, Jeffrey D., and Burns, Jonathan D. Mon . "Solid state characterization of oxidized actinides co-crystallized with uranyl nitrate hexahydrate". United States. doi:https://doi.org/10.1039/C9DT04000E. https://www.osti.gov/servlets/purl/1600514.
@article{osti_1600514,
title = {Solid state characterization of oxidized actinides co-crystallized with uranyl nitrate hexahydrate},
author = {Einkauf, Jeffrey D. and Burns, Jonathan D.},
abstractNote = {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+.},
doi = {10.1039/C9DT04000E},
journal = {Dalton Transactions},
number = 3,
volume = 49,
place = {United States},
year = {2019},
month = {12}
}

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