1
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Silva CL, Amidani L, Retegan M, Weiss S, Bazarkina EF, Graubner T, Kraus F, Kvashnina KO. On the origin of low-valent uranium oxidation state. Nat Commun 2024; 15:6861. [PMID: 39127780 PMCID: PMC11316815 DOI: 10.1038/s41467-024-50924-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Accepted: 07/24/2024] [Indexed: 08/12/2024] Open
Abstract
The significant interest in actinide bonding has recently focused on novel compounds with exotic oxidation states. However, the difficulty in obtaining relevant high-quality experimental data, particularly for low-valent actinide compounds, prevents a deeper understanding of 5f systems. Here we show X-ray absorption near-edge structure (XANES) measurements in the high-energy resolution fluorescence detection (HERFD) mode at the uranium M4 edge for the UIII and UIV halides, namely UX3 and UX4 (X = F, Cl, Br, I). The spectral shapes of these two series exhibit clear differences, which we explain using electronic structure calculations of the 3d-4f resonant inelastic X-ray scattering (RIXS) process. To understand the changes observed, we implemented crystal field models with ab initio derived parameters and investigated the effect of reducing different contributions to the electron-electron interactions involved in the RIXS process. Our analysis shows that the electron-electron interactions weaken as the ligand changes from I to F, indicative of a decrease in ionicity both along and between the UX3 and UX4 halide series.
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Affiliation(s)
- C L Silva
- The Rossendorf Beamline at ESRF-The European Synchrotron, CS40220, 38043, Grenoble Cedex, France
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, 01314, Dresden, Germany
| | - L Amidani
- The Rossendorf Beamline at ESRF-The European Synchrotron, CS40220, 38043, Grenoble Cedex, France.
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, 01314, Dresden, Germany.
| | - M Retegan
- European Synchrotron Radiation Facility (ESRF), CS40220, 38043, Grenoble Cedex, France
| | - S Weiss
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, 01314, Dresden, Germany
| | - E F Bazarkina
- The Rossendorf Beamline at ESRF-The European Synchrotron, CS40220, 38043, Grenoble Cedex, France
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, 01314, Dresden, Germany
| | - T Graubner
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Str. 4, 35032, Marburg, Germany
| | - F Kraus
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Str. 4, 35032, Marburg, Germany
| | - K O Kvashnina
- The Rossendorf Beamline at ESRF-The European Synchrotron, CS40220, 38043, Grenoble Cedex, France.
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, 01314, Dresden, Germany.
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2
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Murphy GL, Gericke R, Gilson S, Bazarkina EF, Rossberg A, Kaden P, Thümmler R, Klinkenberg M, Henkes M, Kegler P, Svitlyk V, Marquardt J, Lender T, Hennig C, Kvashnina KO, Huittinen N. Deconvoluting Cr states in Cr-doped UO 2 nuclear fuels via bulk and single crystal spectroscopic studies. Nat Commun 2023; 14:2455. [PMID: 37117177 PMCID: PMC10147638 DOI: 10.1038/s41467-023-38109-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 04/13/2023] [Indexed: 04/30/2023] Open
Abstract
Cr-doped UO2 is a leading accident tolerant nuclear fuel where the complexity of Cr chemical states in the bulk material has prevented acquisition of an unequivocal understanding of the redox chemistry and mechanism for incorporation of Cr in the UO2 matrix. To resolve this, we have used electron paramagnetic resonance, high energy resolution fluorescence detection X-ray absorption near energy structure and extended X-ray absorption fine structure spectroscopic measurements to examine Cr-doped UO2 single crystal grains and bulk material. Ambient condition measurements of the single crystal grains, which have been mechanically extracted from bulk material, indicated Cr is incorporated substitutionally for U+4 in the fluorite lattice as Cr+3 with formation of additional oxygen vacancies. Bulk material measurements reveal the complexity of Cr states, where metallic Cr (Cr0) and oxide related Cr+2 and Cr+32O3 were identified and attributed to grain boundary species and precipitates, with concurrent (Cr+3xU+41-x)O2-0.5x lattice matrix incorporation. The deconvolution of chemical states via crystal vs. powder measurements enables the understanding of discrepancies in literature whilst providing valuable direction for safe continued use of Cr-doped UO2 fuels for nuclear energy generation.
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Affiliation(s)
- Gabriel L Murphy
- Institute of Energy and Climate Research (IEK-6), Forschungszentrum Jülich GmbH, 52428, Jülich, Germany.
| | - Robert Gericke
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, 01328, Dresden, Germany
| | - Sara Gilson
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, 01328, Dresden, Germany
| | - Elena F Bazarkina
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, 01328, Dresden, Germany
- The Rossendorf Beamline at ESRF, The European Synchrotron, CS40220, 38043, Grenoble, Cedex 9, France
| | - André Rossberg
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, 01328, Dresden, Germany
- The Rossendorf Beamline at ESRF, The European Synchrotron, CS40220, 38043, Grenoble, Cedex 9, France
| | - Peter Kaden
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, 01328, Dresden, Germany
| | - Robert Thümmler
- Institute of Energy and Climate Research (IEK-6), Forschungszentrum Jülich GmbH, 52428, Jülich, Germany
| | - Martina Klinkenberg
- Institute of Energy and Climate Research (IEK-6), Forschungszentrum Jülich GmbH, 52428, Jülich, Germany
| | - Maximilian Henkes
- Institute of Energy and Climate Research (IEK-6), Forschungszentrum Jülich GmbH, 52428, Jülich, Germany
| | - Philip Kegler
- Institute of Energy and Climate Research (IEK-6), Forschungszentrum Jülich GmbH, 52428, Jülich, Germany
| | - Volodymyr Svitlyk
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, 01328, Dresden, Germany
- The Rossendorf Beamline at ESRF, The European Synchrotron, CS40220, 38043, Grenoble, Cedex 9, France
| | - Julien Marquardt
- Institut für Geowissenschaften, Goethe-Universität Frankfurt, 60438, Frankfurt am Main, Germany
| | - Theresa Lender
- Institut für Kristallographie, RWTH Aachen University, 52066, Aachen, Germany
| | - Christoph Hennig
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, 01328, Dresden, Germany
- The Rossendorf Beamline at ESRF, The European Synchrotron, CS40220, 38043, Grenoble, Cedex 9, France
| | - Kristina O Kvashnina
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, 01328, Dresden, Germany
- The Rossendorf Beamline at ESRF, The European Synchrotron, CS40220, 38043, Grenoble, Cedex 9, France
| | - Nina Huittinen
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, 01328, Dresden, Germany.
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3
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Yomogida T, Akiyama D, Ouchi K, Kumagai Y, Higashi K, Kitatsuji Y, Kirishima A, Kawamura N, Takahashi Y. Application of High-Energy-Resolution X-ray Absorption Spectroscopy at the U L 3-Edge to Assess the U(V) Electronic Structure in FeUO 4. Inorg Chem 2022; 61:20206-20210. [PMID: 36459052 PMCID: PMC9768738 DOI: 10.1021/acs.inorgchem.2c03208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
FeUO4 was studied to clarify the electronic structure of U(V) in a metal monouranate compound. We obtained the peak splitting of spectra utilizing high-energy-resolution fluorescence detection-X-ray absorption near-edge structure (HERFD-XANES) spectroscopy at the U L3-edge, which is a novel technique in uranium(V) monouranate compounds. Theoretical calculations revealed that the peak splitting was caused by splitting of the 6d orbital of U(V) in FeUO4, which would be used to detect minor U(V) species. Such distinctive electronic states are of major interest to researchers and engineers working in various fields, from fundamental physics to the nuclear industry and environmental sciences for actinide elements.
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Affiliation(s)
- Takumi Yomogida
- Department
of Earth and Planetary Science, The University
of Tokyo, Hongo 7-3-1, Bunkyo, Tokyo 113-0033, Japan,Nuclear
Science and Engineering Center, Japan Atomic
Energy Agency, Tokai-mura,
Naka-gun, Ibaraki 319-1195, Japan,
| | - Daisuke Akiyama
- Institute
of Multidisciplinary Research for Advanced Materials, Tohoku University, 1-1 Katahira 2, Aoba, Sendai, Miyagi 980-8577, Japan
| | - Kazuki Ouchi
- Nuclear
Science and Engineering Center, Japan Atomic
Energy Agency, Tokai-mura,
Naka-gun, Ibaraki 319-1195, Japan
| | - Yuta Kumagai
- Nuclear
Science and Engineering Center, Japan Atomic
Energy Agency, Tokai-mura,
Naka-gun, Ibaraki 319-1195, Japan
| | - Kotaro Higashi
- Center
for Synchrotron Radiation Research, Japan
Synchrotron Radiation Research Institute (JASRI), Sayo, Hyogo 679-5198, Japan
| | - Yoshihiro Kitatsuji
- Nuclear
Science and Engineering Center, Japan Atomic
Energy Agency, Tokai-mura,
Naka-gun, Ibaraki 319-1195, Japan
| | - Akira Kirishima
- Institute
of Multidisciplinary Research for Advanced Materials, Tohoku University, 1-1 Katahira 2, Aoba, Sendai, Miyagi 980-8577, Japan
| | - Naomi Kawamura
- Center
for Synchrotron Radiation Research, Japan
Synchrotron Radiation Research Institute (JASRI), Sayo, Hyogo 679-5198, Japan
| | - Yoshio Takahashi
- Department
of Earth and Planetary Science, The University
of Tokyo, Hongo 7-3-1, Bunkyo, Tokyo 113-0033, Japan,Isotope Science
Center, University of Tokyo, Bunkyo, Tokyo 113-0032, Japan,Photon
Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, KEK, Tsukuba, Ibaraki 305-0801, Japan
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4
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Kvashnina KO, Butorin SM. High-energy resolution X-ray spectroscopy at actinide M 4,5 and ligand K edges: what we know, what we want to know, and what we can know. Chem Commun (Camb) 2022; 58:327-342. [PMID: 34874022 PMCID: PMC8725612 DOI: 10.1039/d1cc04851a] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 11/15/2021] [Indexed: 12/20/2022]
Abstract
In recent years, scientists have progressively recognized the role of electronic structures in the characterization of chemical properties for actinide containing materials. High-energy resolution X-ray spectroscopy at the actinide M4,5 edges emerged as a promising direction because this method can probe actinide properties at the atomic level through the possibility of reducing the experimental spectral width below the natural core-hole lifetime broadening. Parallel to the technical developments of the X-ray method and experimental discoveries, theoretical models, describing the observed electronic structure phenomena, have also advanced. In this feature article, we describe the latest progress in the field of high-energy resolution X-ray spectroscopy at the actinide M4,5 and ligand K edges and we show that the methods are able to (a) provide fingerprint information on the actinide oxidation state and ground state characters (b) probe 5f occupancy, non-stoichiometry, defects, and ligand/metal ratio and (c) investigate the local symmetry and effects of the crystal field. We discuss the chemical aspects of the electronic structure in terms familiar to chemists and materials scientists and conclude with a brief description of new opportunities and approaches to improve the experimental methodology and theoretical analysis for f-electron systems.
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Affiliation(s)
- Kristina O Kvashnina
- The Rossendorf Beamline at ESRF, The European Synchrotron, CS40220, 38043 Grenoble Cedex 9, France.
- Institute of Resource Ecology, Helmholtz Zentrum Dresden-Rossendorf (HZDR), PO Box 510119, 01314 Dresden, Germany
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Sergei M Butorin
- Condensed Matter Physics of Energy Materials, X-ray Photon Science, Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20 Uppsala, Sweden.
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5
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Romanchuk AY, Vlasova IE, Kalmykov SN. Speciation of Uranium and Plutonium From Nuclear Legacy Sites to the Environment: A Mini Review. Front Chem 2020; 8:630. [PMID: 32903456 PMCID: PMC7434977 DOI: 10.3389/fchem.2020.00630] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Accepted: 06/17/2020] [Indexed: 12/02/2022] Open
Abstract
The row of 15 chemical elements from Ac to Lr with atomic numbers from 89 to 103 are known as the actinides, which are all radioactive. Among them, uranium and plutonium are the most important as they are used in the nuclear fuel cycle and nuclear weapon production. Since the beginning of national nuclear programs and nuclear tests, many radioactively contaminated nuclear legacy sites, have been formed. This mini review covers the latest experimental, modeling, and case studies of plutonium and uranium migration in the environment, including the speciation of these elements and the chemical reactions that control their migration pathways.
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Affiliation(s)
| | | | - Stepan N. Kalmykov
- Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia
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6
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Kvashnina KO, Romanchuk AY, Pidchenko I, Amidani L, Gerber E, Trigub A, Rossberg A, Weiss S, Popa K, Walter O, Caciuffo R, Scheinost AC, Butorin SM, Kalmykov SN. A Novel Metastable Pentavalent Plutonium Solid Phase on the Pathway from Aqueous Plutonium(VI) to PuO
2
Nanoparticles. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201911637] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Kristina O. Kvashnina
- Institute of Resource EcologyHelmholtz Zentrum Dresden-Rossendorf (HZDR) PO Box 510119 01314 Dresden Germany
- The Rossendorf Beamline at ESRFThe European Synchrotron, CS40220 38043 Grenoble Cedex 9 France
| | - Anna Yu. Romanchuk
- Department of ChemistryLomonosov Moscow State University 119991 Moscow Russia
| | - Ivan Pidchenko
- Institute of Resource EcologyHelmholtz Zentrum Dresden-Rossendorf (HZDR) PO Box 510119 01314 Dresden Germany
- The Rossendorf Beamline at ESRFThe European Synchrotron, CS40220 38043 Grenoble Cedex 9 France
| | - Lucia Amidani
- Institute of Resource EcologyHelmholtz Zentrum Dresden-Rossendorf (HZDR) PO Box 510119 01314 Dresden Germany
- The Rossendorf Beamline at ESRFThe European Synchrotron, CS40220 38043 Grenoble Cedex 9 France
| | - Evgeny Gerber
- Institute of Resource EcologyHelmholtz Zentrum Dresden-Rossendorf (HZDR) PO Box 510119 01314 Dresden Germany
- The Rossendorf Beamline at ESRFThe European Synchrotron, CS40220 38043 Grenoble Cedex 9 France
- Department of ChemistryLomonosov Moscow State University 119991 Moscow Russia
| | - Alexander Trigub
- National Research Centre “Kurchatov Institute” 123182 Moscow Russia
| | - Andre Rossberg
- Institute of Resource EcologyHelmholtz Zentrum Dresden-Rossendorf (HZDR) PO Box 510119 01314 Dresden Germany
- The Rossendorf Beamline at ESRFThe European Synchrotron, CS40220 38043 Grenoble Cedex 9 France
| | - Stephan Weiss
- The Rossendorf Beamline at ESRFThe European Synchrotron, CS40220 38043 Grenoble Cedex 9 France
| | - Karin Popa
- Directorate for Nuclear Safety and SecurityEuropean Commission, Joint Research Centre Postfach 2340 76215 Karlsruhe Germany
| | - Olaf Walter
- Directorate for Nuclear Safety and SecurityEuropean Commission, Joint Research Centre Postfach 2340 76215 Karlsruhe Germany
| | - Roberto Caciuffo
- Directorate for Nuclear Safety and SecurityEuropean Commission, Joint Research Centre Postfach 2340 76215 Karlsruhe Germany
| | - Andreas C. Scheinost
- Institute of Resource EcologyHelmholtz Zentrum Dresden-Rossendorf (HZDR) PO Box 510119 01314 Dresden Germany
- The Rossendorf Beamline at ESRFThe European Synchrotron, CS40220 38043 Grenoble Cedex 9 France
| | - Sergei M. Butorin
- Department of Physics and AstronomyMolecular and Condensed Matter PhysicsUppsala University P.O. Box 516 Uppsala Sweden
| | - Stepan N. Kalmykov
- Department of ChemistryLomonosov Moscow State University 119991 Moscow Russia
- National Research Centre “Kurchatov Institute” 123182 Moscow Russia
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7
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Kvashnina KO, Romanchuk AY, Pidchenko I, Amidani L, Gerber E, Trigub A, Rossberg A, Weiss S, Popa K, Walter O, Caciuffo R, Scheinost AC, Butorin SM, Kalmykov SN. A Novel Metastable Pentavalent Plutonium Solid Phase on the Pathway from Aqueous Plutonium(VI) to PuO 2 Nanoparticles. Angew Chem Int Ed Engl 2019; 58:17558-17562. [PMID: 31621992 PMCID: PMC6900038 DOI: 10.1002/anie.201911637] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Indexed: 11/10/2022]
Abstract
Here we provide evidence that the formation of PuO2 nanoparticles from oxidized PuVI under alkaline conditions proceeds through the formation of an intermediate PuV solid phase, similar to NH4 PuO2 CO3 , which is stable over a period of several months. For the first time, state-of-the-art experiments at Pu M4 and at L3 absorption edges combined with theoretical calculations unambiguously allow to determine the oxidation state and the local structure of this intermediate phase.
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Affiliation(s)
- Kristina O. Kvashnina
- Institute of Resource EcologyHelmholtz Zentrum Dresden-Rossendorf (HZDR)PO Box 51011901314DresdenGermany
- The Rossendorf Beamline at ESRFThe European Synchrotron, CS4022038043Grenoble Cedex 9France
| | - Anna Yu. Romanchuk
- Department of ChemistryLomonosov Moscow State University119991MoscowRussia
| | - Ivan Pidchenko
- Institute of Resource EcologyHelmholtz Zentrum Dresden-Rossendorf (HZDR)PO Box 51011901314DresdenGermany
- The Rossendorf Beamline at ESRFThe European Synchrotron, CS4022038043Grenoble Cedex 9France
| | - Lucia Amidani
- Institute of Resource EcologyHelmholtz Zentrum Dresden-Rossendorf (HZDR)PO Box 51011901314DresdenGermany
- The Rossendorf Beamline at ESRFThe European Synchrotron, CS4022038043Grenoble Cedex 9France
| | - Evgeny Gerber
- Institute of Resource EcologyHelmholtz Zentrum Dresden-Rossendorf (HZDR)PO Box 51011901314DresdenGermany
- The Rossendorf Beamline at ESRFThe European Synchrotron, CS4022038043Grenoble Cedex 9France
- Department of ChemistryLomonosov Moscow State University119991MoscowRussia
| | - Alexander Trigub
- National Research Centre “Kurchatov Institute”123182MoscowRussia
| | - Andre Rossberg
- Institute of Resource EcologyHelmholtz Zentrum Dresden-Rossendorf (HZDR)PO Box 51011901314DresdenGermany
- The Rossendorf Beamline at ESRFThe European Synchrotron, CS4022038043Grenoble Cedex 9France
| | - Stephan Weiss
- The Rossendorf Beamline at ESRFThe European Synchrotron, CS4022038043Grenoble Cedex 9France
| | - Karin Popa
- Directorate for Nuclear Safety and SecurityEuropean Commission, Joint Research CentrePostfach 234076215KarlsruheGermany
| | - Olaf Walter
- Directorate for Nuclear Safety and SecurityEuropean Commission, Joint Research CentrePostfach 234076215KarlsruheGermany
| | - Roberto Caciuffo
- Directorate for Nuclear Safety and SecurityEuropean Commission, Joint Research CentrePostfach 234076215KarlsruheGermany
| | - Andreas C. Scheinost
- Institute of Resource EcologyHelmholtz Zentrum Dresden-Rossendorf (HZDR)PO Box 51011901314DresdenGermany
- The Rossendorf Beamline at ESRFThe European Synchrotron, CS4022038043Grenoble Cedex 9France
| | - Sergei M. Butorin
- Department of Physics and AstronomyMolecular and Condensed Matter PhysicsUppsala UniversityP.O. Box 516UppsalaSweden
| | - Stepan N. Kalmykov
- Department of ChemistryLomonosov Moscow State University119991MoscowRussia
- National Research Centre “Kurchatov Institute”123182MoscowRussia
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8
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Amidani L, Plakhova TV, Romanchuk AY, Gerber E, Weiss S, Efimenko A, Sahle CJ, Butorin SM, Kalmykov SN, Kvashnina KO. Understanding the size effects on the electronic structure of ThO2 nanoparticles. Phys Chem Chem Phys 2019; 21:10635-10643. [DOI: 10.1039/c9cp01283d] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
High-resolution XANES spectra of small ThO2 nanoparticles show the signature of the more exposed Th atoms at the surface.
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Affiliation(s)
- Lucia Amidani
- The Rossendorf Beamline at ESRF – The European Synchrotron
- CS40220
- 38043 Grenoble Cedex 9
- France
- Helmholtz Zentrum Dresden-Rossendorf (HZDR)
| | - Tatiana V. Plakhova
- Department of Chemistry
- Lomonosov Moscow State University
- Moscow
- Russian Federation
| | - Anna Yu. Romanchuk
- Department of Chemistry
- Lomonosov Moscow State University
- Moscow
- Russian Federation
| | - Evgeny Gerber
- The Rossendorf Beamline at ESRF – The European Synchrotron
- CS40220
- 38043 Grenoble Cedex 9
- France
- Helmholtz Zentrum Dresden-Rossendorf (HZDR)
| | - Stephan Weiss
- Helmholtz Zentrum Dresden-Rossendorf (HZDR)
- Institute of Resource Ecology
- 01314 Dresden
- Germany
| | - Anna Efimenko
- ESRF – The European Synchrotron
- CS40220
- 38043 Grenoble Cedex 9
- France
| | | | - Sergei M. Butorin
- Molecular and Condensed Matter Physics
- Department of Physics and Astronomy
- Uppsala University
- Uppsala
- Sweden
| | - Stepan N. Kalmykov
- Department of Chemistry
- Lomonosov Moscow State University
- Moscow
- Russian Federation
| | - Kristina O. Kvashnina
- The Rossendorf Beamline at ESRF – The European Synchrotron
- CS40220
- 38043 Grenoble Cedex 9
- France
- Helmholtz Zentrum Dresden-Rossendorf (HZDR)
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9
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Bao H, Duan P, Zhou J, Cao H, Li J, Yu H, Jiang Z, Liu H, Zhang L, Lin J, Chen N, Lin X, Liu Y, Huang Y, Wang JQ. Uranium-Induced Changes in Crystal-Field and Covalency Effects of Th4+ in Th1–xUxO2 Mixed Oxides Probed by High-Resolution X-ray Absorption Spectroscopy. Inorg Chem 2018; 57:11404-11413. [DOI: 10.1021/acs.inorgchem.8b01142] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hongliang Bao
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, PR China
| | - Peiquan Duan
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, PR China
- University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Jing Zhou
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, PR China
| | - Hanjie Cao
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, PR China
- University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Jiong Li
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, PR China
| | - Haisheng Yu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, PR China
| | - Zheng Jiang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, PR China
| | - Hongtao Liu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, PR China
| | - Linjuan Zhang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, PR China
| | - Jian Lin
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, PR China
| | - Ning Chen
- Canadian Light Source, University of Saskatchewan, Saskatoon, Saskatchewan S7N 2 V3, Canada
| | - Xiao Lin
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, PR China
- University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Yancheng Liu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, PR China
| | - Yuying Huang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, PR China
| | - Jian-Qiang Wang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, PR China
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10
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Kvashnina KO, Kowalski PM, Butorin SM, Leinders G, Pakarinen J, Bès R, Li H, Verwerft M. Trends in the valence band electronic structures of mixed uranium oxides. Chem Commun (Camb) 2018; 54:9757-9760. [DOI: 10.1039/c8cc05464a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The valence band electronic structures of mixed uranium oxides (UO2, U4O9, U3O7, U3O8, and β-UO3) have been studied using the resonant inelastic X-ray scattering (RIXS) technique at the U M5 edge and computational methods.
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Affiliation(s)
- Kristina O. Kvashnina
- Rossendorf Beamline at ESRF – The European Synchrotron
- CS40220
- 38043 Grenoble Cedex 9
- France
- Helmholtz Zentrum Dresden-Rossendorf (HZDR)
| | - Piotr M. Kowalski
- Institute of Energy and Climate Research
- IEK-6
- Nuclear Waste Management and Reactor Safety
- Forschungszentrum Jülich GmbH
- 52428 Jülich
| | - Sergei M. Butorin
- Molecular and Condensed Matter Physics
- Department of Physics and Astronomy
- Uppsala University
- SE-751 20 Uppsala
- Sweden
| | - Gregory Leinders
- Belgian Nuclear Research Centre (SCK·CEN)
- Institute for Nuclear Materials Science
- B-2400 Mol
- Belgium
| | - Janne Pakarinen
- Belgian Nuclear Research Centre (SCK·CEN)
- Institute for Nuclear Materials Science
- B-2400 Mol
- Belgium
| | - René Bès
- Department of Applied Physics
- Aalto University
- FI-00076 Aalto
- Finland
| | - Haijian Li
- Institute of Energy and Climate Research
- IEK-6
- Nuclear Waste Management and Reactor Safety
- Forschungszentrum Jülich GmbH
- 52428 Jülich
| | - Marc Verwerft
- Belgian Nuclear Research Centre (SCK·CEN)
- Institute for Nuclear Materials Science
- B-2400 Mol
- Belgium
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Butorin SM, Kvashnina KO, Prieur D, Rivenet M, Martin PM. Characteristics of chemical bonding of pentavalent uranium in La-doped UO2. Chem Commun (Camb) 2017; 53:115-118. [DOI: 10.1039/c6cc07684j] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
HERFD-XAS studies clearly reveal U(v) formation in the cubic environment in UO2 as a result of La doping.
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Affiliation(s)
- Sergei M. Butorin
- Molecular and Condensed Matter Physics
- Department of Physics and Astronomy
- Uppsala University
- SE-751 20 Uppsala
- Sweden
| | - Kristina O. Kvashnina
- The European Synchrotron
- CS40220
- 38043 Grenoble Cedex 9
- France
- Helmholtz Zentrum Dresden-Rossendorf (HZDR)
| | - Damien Prieur
- European Commission
- Joint Research Centre
- Institute for Transuranium Elements
- D-76125 Karlsruhe
- Germany
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12
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High-resolution X-ray absorption spectroscopy as a probe of crystal-field and covalency effects in actinide compounds. Proc Natl Acad Sci U S A 2016; 113:8093-7. [PMID: 27370799 DOI: 10.1073/pnas.1601741113] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Applying the high-energy resolution fluorescence-detection (HERFD) mode of X-ray absorption spectroscopy (XAS), we were able to probe, for the first time to our knowledge, the crystalline electric field (CEF) splittings of the [Formula: see text] shell directly in the HERFD-XAS spectra of actinides. Using ThO2 as an example, data measured at the Th 3d edge were interpreted within the framework of the Anderson impurity model. Because the charge-transfer satellites were also resolved in the HERFD-XAS spectra, the analysis of these satellites revealed that ThO2 is not an ionic compound as previously believed. The Th [Formula: see text] occupancy in the ground state was estimated to be twice that of the Th [Formula: see text] states. We demonstrate that HERFD-XAS allows for characterization of the CEF interaction and degree of covalency in the ground state of actinide compounds as it is extensively done for 3d transition metal systems.
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13
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Butorin SM, Kvashnina KO, Smith AL, Popa K, Martin PM. Crystal-Field and Covalency Effects in Uranates: An X-ray Spectroscopic Study. Chemistry 2016; 22:9693-8. [DOI: 10.1002/chem.201505091] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Sergei M. Butorin
- Molecular and Condensed Matter Physics; Department of Physics and Astronomy; Uppsala University, P. O. Box 516; 751 20 Uppsala Sweden
| | - Kristina O. Kvashnina
- European Synchrotron Radiation Facility; CS40220 38043 Grenoble Cedex 9 France
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR); Institute of Resource Ecology, P.O. Box 510119; 01314 Dresden Germany
| | - Anna L. Smith
- Department of Radiation Science and Technology; TU Delft; Mekelweg 15 2629 JB Delft Netherlands
| | - Karin Popa
- European Commission; Joint Research Centre; Institute for Transuranium Elements, P.O. Box 2340; 76125 Karlsruhe Germany
| | - Philippe M. Martin
- CEA Marcoule, CEA, DEN, DTEC/SECA/LCC; 30207 Bagnols-sur-Cèze Cedex France
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14
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Butorin SM, Modin A, Vegelius JR, Suzuki MT, Oppeneer PM, Andersson DA, Shuh DK. Local Symmetry Effects in Actinide 4f X-ray Absorption in Oxides. Anal Chem 2016; 88:4169-73. [PMID: 27008406 DOI: 10.1021/acs.analchem.5b04380] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A systematic X-ray absorption study at actinide N6,7 (4f → 6d transitions) edges was performed for light-actinide oxides including data obtained for the first time for NpO2, PuO2, and UO3. The measurements were supported by ab initio calculations based on local-density-approximation with added 5f-5f Coulomb interaction (LDA+U). Improved energy resolution compared to common experiments at actinide L(2,3) (2p → 6d transitions) edges allowed us to resolve the major structures of the unoccupied 6d density of states (DOS) and estimate the crystal-field splittings in the 6d shell directly from the spectra of light-actinide dioxides. The measurements demonstrated an enhanced sensitivity of the N(6,7) spectral shape to changes in the compound crystal structure. For nonstoichiometric NpO(2-x), the filling of the entire band gap with Np 6d states was observed thus supporting a phase coexistence of Np metal and stoichiometric NpO2 which is in agreement with the tentative Np-O phase diagram.
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Affiliation(s)
- Sergei M Butorin
- Department of Physics and Astronomy, Uppsala University , P.O. Box 516, SE-751 20 Uppsala, Sweden
| | - Anders Modin
- Department of Physics and Astronomy, Uppsala University , P.O. Box 516, SE-751 20 Uppsala, Sweden
| | - Johan R Vegelius
- Department of Physics and Astronomy, Uppsala University , P.O. Box 516, SE-751 20 Uppsala, Sweden
| | - Michi-To Suzuki
- Department of Physics and Astronomy, Uppsala University , P.O. Box 516, SE-751 20 Uppsala, Sweden.,RIKEN Center for Emergent Matter Science , 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Peter M Oppeneer
- Department of Physics and Astronomy, Uppsala University , P.O. Box 516, SE-751 20 Uppsala, Sweden
| | - David A Andersson
- Materials Science in Radiation and Dynamical Extremes, Materials Science and Technology Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States
| | - David K Shuh
- Chemical Sciences Division, Lawrence Berkeley National Laboratory , MS 70A1150, One Cyclotron Road, Berkeley, California 94720, United States
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