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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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2
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Prieur D, Martel L, Vigier JF, Scheinost AC, Kvashnina KO, Somers J, Martin PM. Aliovalent Cation Substitution in UO 2: Electronic and Local Structures of U 1-yLa yO 2±x Solid Solutions. Inorg Chem 2018; 57:1535-1544. [PMID: 29327923 DOI: 10.1021/acs.inorgchem.7b02839] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
For nuclear fuel related applications, the oxygen stoichiometry of mixed oxides U1-yMyO2±x is an essential property as it affects fuel properties and may endanger the safe operation of nuclear reactors. A careful review of the open literature indicates that this parameter is difficult to assess properly and that the nature of the defects, i.e., oxygen vacancies or UV, in aliovalent cation-doped UO2 is still subject to controversy. To confirm the formation of UV, we have investigated the room-temperature stable U1-yLayO2±x phase using several experimental methods (e.g., XRD, XANES, and NMR) confirmed by theoretical calculations. This paper presents the experimental proof of UV and its effect we identified in both electronic and local structure. We observe that UV is formed in quasi-equimolar proportion as LaIII in U1-yLayO2±x (y = 0.06, 0.11, and 0.22) solid solutions. The fluorite structure is maintained despite the cationic substitution, but the local structure is affected as variations of the interatomic distances are found. Therefore, we provide here the definitive proof that the substitution of UIV with LaIII is not accommodated by the creation of O vacancies as has often been assumed. The UO2 fluorite structure compensates the incorporation of an aliovalent cation by the formation of UV in quasi-equimolar proportions.
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Affiliation(s)
- Damien Prieur
- European Commission, Joint Research Centre (JRC) , Postfach 2340, 76125 Karlsruhe, Germany.,Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology , P.O. Box 10119, 01314 Dresden, Germany.,Rossendorf beamline (BM20-CRG), European Synchrotron Radiation Facility , 6 rue Jules Horowitz, BP 220, 38043 Grenoble, France
| | - Laura Martel
- European Commission, Joint Research Centre (JRC) , Postfach 2340, 76125 Karlsruhe, Germany
| | - Jean-François Vigier
- European Commission, Joint Research Centre (JRC) , Postfach 2340, 76125 Karlsruhe, Germany
| | - Andreas C Scheinost
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology , P.O. Box 10119, 01314 Dresden, Germany.,Rossendorf beamline (BM20-CRG), European Synchrotron Radiation Facility , 6 rue Jules Horowitz, BP 220, 38043 Grenoble, France
| | - Kristina O Kvashnina
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology , P.O. Box 10119, 01314 Dresden, Germany.,Rossendorf beamline (BM20-CRG), European Synchrotron Radiation Facility , 6 rue Jules Horowitz, BP 220, 38043 Grenoble, France
| | - Joseph Somers
- European Commission, Joint Research Centre (JRC) , Postfach 2340, 76125 Karlsruhe, Germany
| | - Philippe M Martin
- CEA, Nuclear Energy Division , Research Department on Mining and Fuel Recycling Processes, SFMA, BP 17171, F-30207 Bagnols-sur-Cèze, France
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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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4
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Structural investigations of PuIII phosphate by X-ray diffraction, MAS-NMR and XANES spectroscopy. J SOLID STATE CHEM 2015. [DOI: 10.1016/j.jssc.2015.07.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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5
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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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6
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Vigier JF, Martin PM, Martel L, Prieur D, Scheinost AC, Somers J. Structural Investigation of (U0.7Pu0.3)O2-x Mixed Oxides. Inorg Chem 2015; 54:5358-65. [DOI: 10.1021/acs.inorgchem.5b00392] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jean-François Vigier
- European Commission, Joint Research Centre (JRC), Institute for Transuranium Elements (ITU), Postfach 2340, 76125 Karlsruhe, Germany
| | | | - Laura Martel
- European Commission, Joint Research Centre (JRC), Institute for Transuranium Elements (ITU), Postfach 2340, 76125 Karlsruhe, Germany
| | - Damien Prieur
- European Commission, Joint Research Centre (JRC), Institute for Transuranium Elements (ITU), Postfach 2340, 76125 Karlsruhe, Germany
| | - Andreas C. Scheinost
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, D-01314 Dresden, Germany
| | - Joseph Somers
- European Commission, Joint Research Centre (JRC), Institute for Transuranium Elements (ITU), Postfach 2340, 76125 Karlsruhe, Germany
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Prieur D, Vigier JF, Wiss T, Janssen A, Rothe J, Cambriani A, Somers J. Structural investigation of self-irradiation damaged AmO2. J SOLID STATE CHEM 2014. [DOI: 10.1016/j.jssc.2013.12.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Belin RC, Martin PM, Lechelle J, Reynaud M, Scheinost AC. Role of Cation Interactions in the Reduction Process in Plutonium–Americium Mixed Oxides. Inorg Chem 2013; 52:2966-72. [DOI: 10.1021/ic3023776] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Renaud C. Belin
- CEA, DEN, DEC, Cadarache F-13108 Saint-Paul-Lez-Durance, France
| | | | | | - Muriel Reynaud
- CEA, DEN, DEC, Cadarache F-13108 Saint-Paul-Lez-Durance, France
| | - Andreas C. Scheinost
- Helmholtz Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology,
P.O. Box 510119, 01314 Dresden, Germany, and Rossendorf Beamline at ESRF, BP 220, F-38043 Grenoble, France
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Prieur D, Carvajal-Nunez U, Vitova T, Somers J. Local and Electronic Structure of Americium-Bearing PuO2. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201201294] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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