Additional complexity in the Raman spectra of U3O8

A. Miskowiec; J. L. Niedziela; T. L. Spano; M. W. Ambrogio; S. Finkeldei; R. Hunt; A. E. Shields

doi:10.1016/j.jnucmat.2019.151790

Additional complexity in the Raman spectra of U₃O₈

A. Miskowiec, J. L. Niedziela, T. L. Spano, M. W. Ambrogio, S. Finkeldei, R. Hunt, A. E. Shields

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

Uranium oxides are readily amenable to investigation using Raman spectroscopy, and this technique is frequently used as a chemical analysis tool. We show, in triuranium octoxide (U₃O₈), the presence of previously unreported Raman peaks located below 100 cm⁻¹. By maximum intensity, the strongest peak in U₃O₈ appears at 54 cm⁻¹ and is resolution limited, making this mode an ideal candidate for chemically identifying U₃O₈ using Raman spectroscopy. Detailed peak analysis indicates that the main spectral feature between 300 and 500 cm⁻¹ is more accurately described by a septet than a triplet. Two samples of differing oxygen content show only minor differences in bulk crystal structure, but subtle changes in lattice dynamics are suggestive of defect scattering in analogy to UO_2+x.

Original language	English
Article number	151790
Journal	Journal of Nuclear Materials
Volume	527
DOIs	https://doi.org/10.1016/j.jnucmat.2019.151790
State	Published - Dec 15 2019

Funding

This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05- 00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ).

Funders	Funder number
U.S. Department of Energy
U.S. Department of Energy

Keywords

Raman spectroscopy
UO
Uranium oxides

Access to Document

10.1016/j.jnucmat.2019.151790

Cite this

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title = "Additional complexity in the Raman spectra of U3O8 ",

abstract = "Uranium oxides are readily amenable to investigation using Raman spectroscopy, and this technique is frequently used as a chemical analysis tool. We show, in triuranium octoxide (U3O8), the presence of previously unreported Raman peaks located below 100 cm−1. By maximum intensity, the strongest peak in U3O8 appears at 54 cm−1 and is resolution limited, making this mode an ideal candidate for chemically identifying U3O8 using Raman spectroscopy. Detailed peak analysis indicates that the main spectral feature between 300 and 500 cm−1 is more accurately described by a septet than a triplet. Two samples of differing oxygen content show only minor differences in bulk crystal structure, but subtle changes in lattice dynamics are suggestive of defect scattering in analogy to UO2+x.",

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AU - Miskowiec, A.

AU - Niedziela, J. L.

AU - Spano, T. L.

AU - Ambrogio, M. W.

AU - Finkeldei, S.

AU - Hunt, R.

AU - Shields, A. E.

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AB - Uranium oxides are readily amenable to investigation using Raman spectroscopy, and this technique is frequently used as a chemical analysis tool. We show, in triuranium octoxide (U3O8), the presence of previously unreported Raman peaks located below 100 cm−1. By maximum intensity, the strongest peak in U3O8 appears at 54 cm−1 and is resolution limited, making this mode an ideal candidate for chemically identifying U3O8 using Raman spectroscopy. Detailed peak analysis indicates that the main spectral feature between 300 and 500 cm−1 is more accurately described by a septet than a triplet. Two samples of differing oxygen content show only minor differences in bulk crystal structure, but subtle changes in lattice dynamics are suggestive of defect scattering in analogy to UO2+x.

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