101
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Ilton ES, Du Y, Stubbs JE, Eng PJ, Chaka AM, Bargar JR, Nelin CJ, Bagus PS. Quantifying small changes in uranium oxidation states using XPS of a shallow core level. Phys Chem Chem Phys 2017; 19:30473-30480. [DOI: 10.1039/c7cp05805e] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Quantification of U(iv), U(v), and U(vi) in UO2+x using the 5d XPS.
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Affiliation(s)
| | - Yingge Du
- Pacific Northwest National Laboratory
- Richland
- USA
| | - Joanne E. Stubbs
- Center for Advanced Radiation Sources
- University of Chicago
- Chicago
- USA
| | - Peter J. Eng
- Center for Advanced Radiation Sources
- University of Chicago
- Chicago
- USA
- James Franck Institute
| | | | | | | | - Paul S. Bagus
- Department of Chemistry
- University of North Texas
- Denton
- USA
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102
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Sanyal K, Khooha A, Das G, Tiwari MK, Misra NL. Direct Determination of Oxidation States of Uranium in Mixed-Valent Uranium Oxides Using Total Reflection X-ray Fluorescence X-ray Absorption Near-Edge Spectroscopy. Anal Chem 2016; 89:871-876. [PMID: 27936602 DOI: 10.1021/acs.analchem.6b03945] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Total reflection X-ray fluorescence (TXRF)-based X-ray absorption near-edge spectroscopy has been used to determine the oxidation state of uranium in mixed-valent U3O8 and U3O7 uranium oxides. The TXRF spectra of the compounds were measured using variable X-ray energies in the vicinity of the U L3 edge in the TXRF excitation mode at the microfocus beamline of the Indus-2 synchrotron facility. The TXRF-based X-ray absorption near-edge spectroscopy (TXRF-XANES) spectra were deduced from the emission spectra measured using the energies below and above the U L3 edge in the XANES region. The data processing using TXRF-XANES spectra of U(IV), U(V), and U(VI) standard compounds revealed that U present in U3O8 is a mixture of U(V) and U(VI), whereas U in U3O7 is mixture of U(IV) and U(VI). The results obtained in this study are similar to that reported in literature using the U M edge. The present study has demonstrated the possibility of application of TXRF for the oxidation state determination and elemental speciation of radioactive substances in a nondestructive manner with very small amount of sample requirement.
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Affiliation(s)
- Kaushik Sanyal
- Fuel Chemistry Division, Bhabha Atomic Research Centre , Mumbai 400085, India.,Homi Bhabha National Institute , Mumbai 400094, India
| | - Ajay Khooha
- Synchrotrons Utilisation Section, Raja Ramanna Centre for Advanced Technology , Indore 452013, India
| | - Gangadhar Das
- Synchrotrons Utilisation Section, Raja Ramanna Centre for Advanced Technology , Indore 452013, India.,Homi Bhabha National Institute , Mumbai 400094, India
| | - M K Tiwari
- Synchrotrons Utilisation Section, Raja Ramanna Centre for Advanced Technology , Indore 452013, India.,Homi Bhabha National Institute , Mumbai 400094, India
| | - N L Misra
- Fuel Chemistry Division, Bhabha Atomic Research Centre , Mumbai 400085, India.,Homi Bhabha National Institute , Mumbai 400094, India
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103
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Caisso M, Roussel P, Den Auwer C, Picart S, Hennig C, Scheinost AC, Delahaye T, Ayral A. Evidence of Trivalent Am Substitution into U 3O 8. Inorg Chem 2016; 55:10438-10444. [PMID: 27686632 DOI: 10.1021/acs.inorgchem.6b01672] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
U3O8 is considered to be the most stable phase for uranium oxide. Its structural properties must be accurately understood to foresee and manage aspects such as its leaching behavior when spent nuclear fuel is stored in an oxidative environment. Moreover, as fuel irradiation causes the formation of fission products and activation products such as plutonium and minor actinides, it is probable that U3O8 will be mixed with other chemical elements under real conditions of oxidation. The storage issue can be extended to americium transmutation, where the irradiated compounds are mixed oxides composed of uranium and americium. This study thus focused on determining the structural properties of a solid solution containing uranium and trivalent americium (U/Am ratio = 90/10) and synthesized so as to obtain conventional U3O8 oxide. This paper presents the possibility of combining trivalent americium with uranium in a U3O8 mixed oxide for the first time, despite the high valence and atomic ratio differences, and proposes novel structural arrangements. X-ray diffraction measurements reveal americium substitution in U3O8 uranium cationic sites, leading to phase transformation into a U3O8 high-temperature structure and general lattice swelling. X-ray absorption near-edge spectroscopy and extended X-ray absorption fine structure experiments highlight an excess of U+VI organized in uranyl units as the main consequence of accommodation.
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Affiliation(s)
- Marie Caisso
- CEA, DEN, DTEC/SECA/LFC , F-30207 Bagnols-sur-Cèze Cedex, France.,CEA, DEN, DRCP/SERA/LCAR , F-30207 Bagnols-sur-Cèze Cedex, France.,Institut Européen des Membranes, UMR 5635 CNRS-ENSCM-UM2, CC047, Université Montpellier 2 , F-34095 Montpellier Cedex 5, France
| | - Pascal Roussel
- Unité de Catalyse et Chimie du Solide, UMR 8012 CNRS , 59652 Villeneuve d'Ascq Cedex, France
| | - Christophe Den Auwer
- Institut de Chimie de Nice, Université Nice Sophia Antipolis, UMR 7272 , F-06108 Nice cedex 2, France
| | - Sébastien Picart
- CEA, DEN, DRCP/SERA/LCAR , F-30207 Bagnols-sur-Cèze Cedex, France
| | | | - Andreas C Scheinost
- HZDR, Institute of Resource Ecology , 01314 Dresden, Germany.,Rossendorf Beamline, ESRF , 38043 Grenoble, France
| | - Thibaud Delahaye
- CEA, DEN, DRCP/SERA/LCAR , F-30207 Bagnols-sur-Cèze Cedex, France
| | - André Ayral
- Institut Européen des Membranes, UMR 5635 CNRS-ENSCM-UM2, CC047, Université Montpellier 2 , F-34095 Montpellier Cedex 5, France
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104
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Leinders G, Delville R, Pakarinen J, Cardinaels T, Binnemans K, Verwerft M. Assessment of the U3O7 Crystal Structure by X-ray and Electron Diffraction. Inorg Chem 2016; 55:9923-9936. [DOI: 10.1021/acs.inorgchem.6b01941] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gregory Leinders
- Belgian
Nuclear Research Centre (SCK·CEN), Institute for Nuclear Materials Science, Boeretang 200, B-2400 Mol, Belgium
- Department
of Chemistry, KU Leuven, Celestijnenlaan 200F, P.O. Box
2404, B-3001 Heverlee, Belgium
| | - Rémi Delville
- Belgian
Nuclear Research Centre (SCK·CEN), Institute for Nuclear Materials Science, Boeretang 200, B-2400 Mol, Belgium
| | - Janne Pakarinen
- Belgian
Nuclear Research Centre (SCK·CEN), Institute for Nuclear Materials Science, Boeretang 200, B-2400 Mol, Belgium
| | - Thomas Cardinaels
- Belgian
Nuclear Research Centre (SCK·CEN), Institute for Nuclear Materials Science, Boeretang 200, B-2400 Mol, Belgium
- Department
of Chemistry, KU Leuven, Celestijnenlaan 200F, P.O. Box
2404, B-3001 Heverlee, Belgium
| | - Koen Binnemans
- Department
of Chemistry, KU Leuven, Celestijnenlaan 200F, P.O. Box
2404, B-3001 Heverlee, Belgium
| | - Marc Verwerft
- Belgian
Nuclear Research Centre (SCK·CEN), Institute for Nuclear Materials Science, Boeretang 200, B-2400 Mol, Belgium
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105
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Desgranges L, Baldinozzi G, Simeone D, Fischer HE. Structural Changes in the Local Environment of Uranium Atoms in the Three Phases of U4O9. Inorg Chem 2016; 55:7485-91. [PMID: 27437727 DOI: 10.1021/acs.inorgchem.6b00654] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The crystal structure of U4O9 remains an enigma because of its differences with U(4+) and U(5+) coordination polyhedral mixtures, as shown in the XANES experimental results. To better understand this crystal structure, its diffraction pattern was measured at seven different temperatures using neutron diffraction before being independently refined by Rietveld's method and pair distribution function analysis. The O cuboctahedron-a structural element consisting of 13 oxygen atoms-is a specific feature of the U4O9 crystal structure. The volume of the cuboctahedron decreases when the temperature increases, whereas the overall volume of the crystal cell increases. This feature can be correlated with the two U4O9 phase transitions that induce sharp changes in the cuboctahedron geometry, suggesting that this structural element has internal dynamics. In particular, these structural modifications in the γ phase suggest that the high-temperature phase can be described as a mixture of U(4+) and U(5+) coordination polyhedra, the latter having U-O distances shorter than 2.2 Å, that are absent in the former. These changes in uranium polyhedra as a function of temperature are tentatively interpreted using steric arguments. They also raise the question of charge localization on the different U ion sites in the low-temperature phases of U4O9.
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Affiliation(s)
- L Desgranges
- CEA/DEN/DEC Bat 352 Cadarache , 13108 Saint Paul lez Durance, France
| | - G Baldinozzi
- SPMS, LRC Carmen, CNRS Centrale Supélec , 92295 Châtenay-Malabry, France.,CEA DEN/DANS/DMN/SRMA/LA2M , 91191 Gif-sur-Yvette, France
| | - D Simeone
- SPMS, LRC Carmen, CNRS Centrale Supélec , 92295 Châtenay-Malabry, France.,CEA DEN/DANS/DMN/SRMA/LA2M , 91191 Gif-sur-Yvette, France
| | - H E Fischer
- Institut Laue-Langevin , 6 rue Jules Horowitz, B.P. 156, 38042 Grenoble cedex, France
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106
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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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107
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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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108
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Pidchenko I, Heberling F, Kvashnina KO, Finck N, Schild D, Bohnert E, Schäfer T, Rothe J, Geckeis H, Vitova T. Aqueous U(VI) interaction with magnetite nanoparticles in a mixed flow reactor system: HR-XANES study. ACTA ACUST UNITED AC 2016. [DOI: 10.1088/1742-6596/712/1/012086] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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109
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Kvashnina KO, Scheinost AC. A Johann-type X-ray emission spectrometer at the Rossendorf beamline. JOURNAL OF SYNCHROTRON RADIATION 2016; 23:836-41. [PMID: 27140166 DOI: 10.1107/s1600577516004483] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 03/15/2016] [Indexed: 05/15/2023]
Abstract
This paper gives a detailed description, including equations, of the Johann-type X-ray emission spectrometer which has been recently installed and tested at the Rossendorf beamline (ROBL) of the European Synchrotron Radiation Facility. The spectrometer consists of a single spherically bent crystal analyzer and an avalanche photodiode detector positioned on the vertical Rowland cycle of 1 m diameter. The hard X-ray emission spectrometer (∼3.5-25 keV) operates at atmospheric pressure and covers the Bragg angles of 65°-89°. The instrument has been tested at high and intermediate incident energies, i.e. at the Zr K-edge and at the Au L3-edge, in the second experimental hutch of ROBL. The spectrometer is dedicated for studying actinides in materials and environmental samples by high-energy-resolution X-ray absorption and X-ray emission spectroscopies.
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Affiliation(s)
- Kristina O Kvashnina
- Rossendorf Beamline at ESRF - The European Synchrotron, CS40220, 38043 Grenoble Cedex 9, France
| | - Andreas C Scheinost
- Rossendorf Beamline at ESRF - The European Synchrotron, CS40220, 38043 Grenoble Cedex 9, France
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110
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Bès R, Rivenet M, Solari PL, Kvashnina KO, Scheinost AC, Martin PM. Use of HERFD–XANES at the U L3- and M4-Edges To Determine the Uranium Valence State on [Ni(H2O)4]3[U(OH,H2O)(UO2)8O12(OH)3]. Inorg Chem 2016; 55:4260-70. [DOI: 10.1021/acs.inorgchem.6b00014] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- René Bès
- Synchrotron SOLEIL, Ligne de lumière MARS, L’Orme des
Merisiers, Saint Aubin, BP 48, F-91192 Gif-sur-Yvette Cedex, France
- CEA, DEN, DEC, Centre d’études nucléaires de Cadarache, F-13108 Saint Paul
Lez Durance, France
| | - Murielle Rivenet
- Université Lille, CNRS, Centrale Lille, ENSCL, Université Artois, UMR 8181, UCCS, Unité de Catalyse et Chimie du Solide, F-59000 Lille, France
| | - Pier-Lorenzo Solari
- CEA, DEN, DEC, Centre d’études nucléaires de Cadarache, F-13108 Saint Paul
Lez Durance, France
| | - Kristina O. Kvashnina
- Rossendorf Beamline (ROBL) at the European Synchrotron Radiation Facility (ESRF), CS40220, F38043 Grenoble, France
- Helmholtz Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, P.O. Box 510119, 01314 Dresden, Germany
| | - Andreas C. Scheinost
- Rossendorf Beamline (ROBL) at the European Synchrotron Radiation Facility (ESRF), CS40220, F38043 Grenoble, France
- Helmholtz Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, P.O. Box 510119, 01314 Dresden, Germany
| | - Philippe M. Martin
- CEA, DEN, DTEC, Centre d’études nucléaires de Marcoule, Bagnols-sur-Cèze F-30207, France
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111
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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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112
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Leinders G, Pakarinen J, Delville R, Cardinaels T, Binnemans K, Verwerft M. Low-Temperature Oxidation of Fine UO2 Powders: A Process of Nanosized Domain Development. Inorg Chem 2016; 55:3915-27. [DOI: 10.1021/acs.inorgchem.6b00127] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gregory Leinders
- Institute
for Nuclear Materials Science, Belgian Nuclear Research Centre (SCK•CEN), Boeretang 200, B-2400 Mol, Belgium
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, P.O. Box 2404, B-3001 Heverlee, Belgium
| | - Janne Pakarinen
- Institute
for Nuclear Materials Science, Belgian Nuclear Research Centre (SCK•CEN), Boeretang 200, B-2400 Mol, Belgium
| | - Rémi Delville
- Institute
for Nuclear Materials Science, Belgian Nuclear Research Centre (SCK•CEN), Boeretang 200, B-2400 Mol, Belgium
| | - Thomas Cardinaels
- Institute
for Nuclear Materials Science, Belgian Nuclear Research Centre (SCK•CEN), Boeretang 200, B-2400 Mol, Belgium
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, P.O. Box 2404, B-3001 Heverlee, Belgium
| | - Koen Binnemans
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, P.O. Box 2404, B-3001 Heverlee, Belgium
| | - Marc Verwerft
- Institute
for Nuclear Materials Science, Belgian Nuclear Research Centre (SCK•CEN), Boeretang 200, B-2400 Mol, Belgium
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113
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Ngayam-Happy R, Krack M, Pautz A. Effects of stoichiometry on the defect clustering in uranium dioxide. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2015; 27:455401. [PMID: 26471388 DOI: 10.1088/0953-8984/27/45/455401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
This study addresses the on-going topic of point defects and point defect clusters in uranium dioxide. Molecular statics simulation using an extended pair potential model that accounts for disproportionation equilibrium as charge compensation has been applied to assess the effect of disproportionation on structural properties and clustering in non-stoichiometric uranium dioxide. The defective structures are scanned in minute detail using a powerful and versatile analysing tool, called ASTRAM, developed in-house for the purpose. Unlike pair potential models ignoring disproportionation effects, our model reproduces volume changes observed experimentally in non-stoichiometric UO2-x and UO2+x. The oxygen defect energetics computed is in good agreement with data in the literature. The model is used to assess the clustering that occurs in bulk samples of non-stoichiometric uranium dioxide. This study confirms the generation of split-interstitial clusters as the dominant defect type in non-stoichiometric uranium dioxide. A new key mechanism for defect clustering in hyper-stoichiometric uranium dioxide is proposed that is based on the progressive aggregation of primitive blocks identified as 1-vacancy split-interstitial clusters.
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Affiliation(s)
- Raoul Ngayam-Happy
- Laboratory for Reactor Physics and Systems Behaviour, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
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114
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Comparative XRPD and XAS study of the impact of the synthesis process on the electronic and structural environments of uranium–americium mixed oxides. J SOLID STATE CHEM 2015. [DOI: 10.1016/j.jssc.2015.03.037] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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115
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Lebreton F, Horlait D, Caraballo R, Martin PM, Scheinost AC, Rossberg A, Jégou C, Delahaye T. Peculiar Behavior of (U,Am)O2−δ Compounds for High Americium Contents Evidenced by XRD, XAS, and Raman Spectroscopy. Inorg Chem 2015; 54:9749-60. [DOI: 10.1021/acs.inorgchem.5b01357] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Florent Lebreton
- CEA, DEN, DTEC/SDTC/LEMA, F-30207 Bagnols-sur-Cèze
Cedex, France
| | - Denis Horlait
- CEA, DEN, DTEC/SDTC/LEMA, F-30207 Bagnols-sur-Cèze
Cedex, France
| | | | | | - Andreas C. Scheinost
- Helmholtz Zentrum Dresden
Rossendorf, Institute of Resource Ecology, P.O. Box 10119, 01314 Dresden, Germany
| | - Andre Rossberg
- Helmholtz Zentrum Dresden
Rossendorf, Institute of Resource Ecology, P.O. Box 10119, 01314 Dresden, Germany
| | - Christophe Jégou
- CEA, DEN, DTCD/SECM/LMPA, F-30207 Bagnols-sur-Cèze
Cedex, France
| | - Thibaud Delahaye
- CEA, DEN, DTEC/SDTC/LEMA, F-30207 Bagnols-sur-Cèze
Cedex, France
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116
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Kvashnina KO, Kvashnin YO, Vegelius JR, Bosak A, Martin PM, Butorin SM. Sensitivity to Actinide Doping of Uranium Compounds by Resonant Inelastic X-ray Scattering at Uranium L3 Edge. Anal Chem 2015; 87:8772-80. [DOI: 10.1021/acs.analchem.5b01699] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kristina O. Kvashnina
- European Synchrotron Radiation Facility, 6 Rue Jules Horowitz, BP 220, 38043, Grenoble, France
| | - Yaroslav O. Kvashnin
- European Synchrotron Radiation Facility, 6 Rue Jules Horowitz, BP 220, 38043, Grenoble, France
- Department
of Physics and Astronomy, Uppsala University, Box 516, S-751 20 Uppsala, Sweden
| | - Johan R. Vegelius
- Department
of Physics and Astronomy, Uppsala University, Box 516, S-751 20 Uppsala, Sweden
| | - Alexei Bosak
- European Synchrotron Radiation Facility, 6 Rue Jules Horowitz, BP 220, 38043, Grenoble, France
| | | | - Sergei M. Butorin
- Department
of Physics and Astronomy, Uppsala University, Box 516, S-751 20 Uppsala, Sweden
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117
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Smith AL, Raison PE, Martel L, Prieur D, Charpentier T, Wallez G, Suard E, Scheinost AC, Hennig C, Martin P, Kvashnina KO, Cheetham AK, Konings RJM. A New Look at the Structural Properties of Trisodium Uranate Na3UO4. Inorg Chem 2015; 54:3552-61. [DOI: 10.1021/acs.inorgchem.5b00136] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anna L. Smith
- European Commission, Joint Research Centre, Institute for Transuranium Elements, P.O. Box 2340, D-76125 Karlsruhe, Germany
- Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, United Kingdom
| | - Philippe E. Raison
- European Commission, Joint Research Centre, Institute for Transuranium Elements, P.O. Box 2340, D-76125 Karlsruhe, Germany
| | - Laura Martel
- European Commission, Joint Research Centre, Institute for Transuranium Elements, P.O. Box 2340, D-76125 Karlsruhe, Germany
| | - Damien Prieur
- European Commission, Joint Research Centre, Institute for Transuranium Elements, P.O. Box 2340, D-76125 Karlsruhe, Germany
| | | | - Gilles Wallez
- PSL Research University, Chimie ParisTech−CNRS, Institut de Recherche de Chimie Paris, 75005 Paris, France
- Sorbonne University, UPMC Université Paris 06, 75005 Paris, France
| | - Emmanuelle Suard
- Institut Laue Langevin, Rue Jules Horowitz, BP 156, 38042, Grenoble cedex 9, France
| | - Andreas C. Scheinost
- Helmholtz
Zentrum Dresden Rossendorf (HZDR), Institute of Resource Ecology, P.O. Box 10119, 01314 Dresden, Germany
| | - Christoph Hennig
- Helmholtz
Zentrum Dresden Rossendorf (HZDR), Institute of Resource Ecology, P.O. Box 10119, 01314 Dresden, Germany
| | - Philippe Martin
- CEA, DEN, DEC, CEN Cadarache, 13108 St. Paul Lez Durance, France
| | - Kristina O. Kvashnina
- European Synchrotron Radiation Facility, 6 rue Jules Horowitz, BP 220, 38043 Grenoble, France
| | - Anthony K. Cheetham
- Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, United Kingdom
| | - Rudy J. M. Konings
- European Commission, Joint Research Centre, Institute for Transuranium Elements, P.O. Box 2340, D-76125 Karlsruhe, Germany
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118
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Flitcroft JM, Molinari M, Brincat NA, Storr MT, Parker SC. Hydride ion formation in stoichiometric UO2. Chem Commun (Camb) 2015; 51:16209-12. [DOI: 10.1039/c5cc04799d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We investigated hydrogen solubility in UO2 using DFT and predicted that hydrogen species energetically prefers to exist as a hydride ion rather than a proton in a hydroxyl group and on diffusion hydrogen's charge state will change.
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Affiliation(s)
| | - M. Molinari
- Department of Chemistry
- University of Bath
- Bath
- UK
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119
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Brincat NA, Parker SC, Molinari M, Allen GC, Storr MT. Density functional theory investigation of the layered uranium oxides U3O8 and U2O5. Dalton Trans 2015; 44:2613-22. [DOI: 10.1039/c4dt02493a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New predictions of structural, electronic and mechanical properties of layered uranium oxides using DFT + U calculations.
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120
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Lebreton F, Martin PM, Horlait D, Bès R, Scheinost AC, Rossberg A, Delahaye T, Blanchart P. New Insight into Self-Irradiation Effects on Local and Long-Range Structure of Uranium–Americium Mixed Oxides (through XAS and XRD). Inorg Chem 2014; 53:9531-40. [DOI: 10.1021/ic500681k] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Florent Lebreton
- DTEC/SDTC/LEMA, DEN, CEA, F-30207 Bagnols-sur-Cèze Cedex, France
- GEMH/ENSCI, 87065 Limoges, France
| | | | - Denis Horlait
- DTEC/SDTC/LEMA, DEN, CEA, F-30207 Bagnols-sur-Cèze Cedex, France
| | - René Bès
- DEC/SECS/LLCC, DEN, CEA, F-13108 Saint-Paul-lez-Durance
Cedex, France
| | - Andreas C. Scheinost
- Helmholtz Zentrum Dresden
Rossendorf (HZDR), Institute of Radiochemistry, P.O. Box 10119, 01314 Dresden, Germany
| | - Andre Rossberg
- Helmholtz Zentrum Dresden
Rossendorf (HZDR), Institute of Radiochemistry, P.O. Box 10119, 01314 Dresden, Germany
| | - Thibaud Delahaye
- DTEC/SDTC/LEMA, DEN, CEA, F-30207 Bagnols-sur-Cèze Cedex, France
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