Spectroscopic studies of the several isomers of UO3

Lucas E. Sweet; Dallas D. Reilly; David G. Abrecht; Edgar C. Buck; David E. Meier; Yin-Fong Su; Carolyn S. Brauer; Jon M. Schwantes; Russell G. Tonkyn; James E. Szecsody; Thomas A. Blake; Timothy J. Johnson

doi:10.1117/12.2029408

16 October 2013 Spectroscopic studies of the several isomers of UO₃

Lucas E. Sweet, Dallas D. Reilly, David G. Abrecht, Edgar C. Buck, David E. Meier, Yin-Fong Su, Carolyn S. Brauer, Jon M. Schwantes, Russell G. Tonkyn, James E. Szecsody, Thomas A. Blake, Timothy J. Johnson

Author Affiliations +

Proceedings Volume 8901, Optics and Photonics for Counterterrorism, Crime Fighting and Defence IX; and Optical Materials and Biomaterials in Security and Defence Systems Technology X; 890107 (2013) https://doi.org/10.1117/12.2029408
Event: SPIE Security + Defence, 2013, Dresden, Germany

Abstract

Uranium trioxide is known to adopt seven different structural forms. While these structural forms have been well characterized using x-ray or neutron diffraction techniques, little work has been done to characterize their spectroscopic properties, particularly of the pure phases. Since the structural isomers of UO₃ all have similar thermodynamic stabilities and most tend to hydrolyze under open atmospheric conditions, mixtures of UO₃ phases and the hydrolysis products are common. Much effort went into isolating pure phases of UO₃. Utilizing x-ray diffraction as a sample identification check, UV/Vis/NIR spectroscopic signatures of α-UO₃, β-UO₃, γ-UO₃ and α-UO₂(OH)₂ products were obtained. The spectra of the pure phases can now be used to characterize typical samples of UO₃, which are often mixtures of isomers.

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Lucas E. Sweet, Dallas D. Reilly, David G. Abrecht, Edgar C. Buck, David E. Meier, Yin-Fong Su, Carolyn S. Brauer, Jon M. Schwantes, Russell G. Tonkyn, James E. Szecsody, Thomas A. Blake, and Timothy J. Johnson "Spectroscopic studies of the several isomers of UO₃", Proc. SPIE 8901, Optics and Photonics for Counterterrorism, Crime Fighting and Defence IX; and Optical Materials and Biomaterials in Security and Defence Systems Technology X, 890107 (16 October 2013); https://doi.org/10.1117/12.2029408

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