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Ishii Y, Chen J, Yoshida HK, Oda M, Christianson AD, Yamaura K. High-pressure synthesis, crystal structure, and magnetic properties of the Shastry-Sutherland-lattice oxides BaLn2ZnO5 (Ln = Pr, Sm, Eu). J SOLID STATE CHEM 2020. [DOI: 10.1016/j.jssc.2020.121489] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Ji Y, Kowalski PM, Kegler P, Huittinen N, Marks NA, Vinograd VL, Arinicheva Y, Neumeier S, Bosbach D. Rare-Earth Orthophosphates From Atomistic Simulations. Front Chem 2019; 7:197. [PMID: 31001521 PMCID: PMC6456693 DOI: 10.3389/fchem.2019.00197] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 03/14/2019] [Indexed: 11/13/2022] Open
Abstract
Lanthanide phosphates (LnPO4) are considered as a potential nuclear waste form for immobilization of Pu and minor actinides (Np, Am, and Cm). In that respect, in the recent years we have applied advanced atomistic simulation methods to investigate various properties of these materials on the atomic scale. In particular, we computed several structural, thermochemical, thermodynamic and radiation damage related parameters. From a theoretical point of view, these materials turn out to be excellent systems for testing quantum mechanics-based computational methods for strongly correlated electronic systems. On the other hand, by conducting joint atomistic modeling and experimental research, we have been able to obtain enhanced understanding of the properties of lanthanide phosphates. Here we discuss joint initiatives directed at understanding the thermodynamically driven long-term performance of these materials, including long-term stability of solid solutions with actinides and studies of structural incorporation of f elements into these materials. In particular, we discuss the maximum load of Pu into the lanthanide-phosphate monazites. We also address the importance of our results for applications of lanthanide-phosphates beyond nuclear waste applications, in particular the monazite-xenotime systems in geothermometry. For this we have derived a state-of-the-art model of monazite-xenotime solubilities. Last but not least, we discuss the advantage of usage of atomistic simulations and the modern computational facilities for understanding of behavior of nuclear waste-related materials.
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Affiliation(s)
- Yaqi Ji
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research - IEK-6: Nuclear Waste Management and Reactor Safety, Jülich, Germany.,JARA High-Performance Computing, Aachen, Germany
| | - Piotr M Kowalski
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research - IEK-6: Nuclear Waste Management and Reactor Safety, Jülich, Germany.,JARA High-Performance Computing, Aachen, Germany
| | - Philip Kegler
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research - IEK-6: Nuclear Waste Management and Reactor Safety, Jülich, Germany.,JARA High-Performance Computing, Aachen, Germany
| | - Nina Huittinen
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
| | | | - Victor L Vinograd
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research - IEK-6: Nuclear Waste Management and Reactor Safety, Jülich, Germany.,JARA High-Performance Computing, Aachen, Germany
| | - Yulia Arinicheva
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research - IEK-6: Nuclear Waste Management and Reactor Safety, Jülich, Germany.,JARA High-Performance Computing, Aachen, Germany.,Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research - IEK-1: Materials Synthesis and Processing, Jülich, Germany
| | - Stefan Neumeier
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research - IEK-6: Nuclear Waste Management and Reactor Safety, Jülich, Germany.,JARA High-Performance Computing, Aachen, Germany
| | - Dirk Bosbach
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research - IEK-6: Nuclear Waste Management and Reactor Safety, Jülich, Germany.,JARA High-Performance Computing, Aachen, Germany
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Errandonea D, Gomis O, Rodríguez-Hernández P, Muñoz A, Ruiz-Fuertes J, Gupta M, Achary SN, Hirsch A, Manjon FJ, Peters L, Roth G, Tyagi AK, Bettinelli M. High-pressure structural and vibrational properties of monazite-type BiPO 4, LaPO 4, CePO 4, and PrPO 4. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:065401. [PMID: 29337696 DOI: 10.1088/1361-648x/aaa20d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Monazite-type BiPO4, LaPO4, CePO4, and PrPO4 have been studied under high pressure by ab initio simulations and Raman spectroscopy measurements in the pressure range of stability of the monazite structure. A good agreement between experimental and theoretical Raman-active mode frequencies and pressure coefficients has been found which has allowed us to discuss the nature of the Raman-active modes. Besides, calculations have provided us with information on how the crystal structure is modified by pressure. This information has allowed us to determine the equation of state and the isothermal compressibility tensor of the four studied compounds. In addition, the information obtained on the polyhedral compressibility has been used to explain the anisotropic axial compressibility and the bulk compressibility of monazite phosphates. Finally, we have carried out a systematic discussion on the high-pressure behavior of the four studied phosphates in comparison to results of previous studies.
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Affiliation(s)
- D Errandonea
- Departamento de Física Aplicada-ICMUV, MALTA Consolider Team, Universitat de València, Edificio de Investigación, C/Dr. Moliner 50, Burjassot, 46100 Valencia, Spain
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Neumeier S, Arinicheva Y, Ji Y, Heuser JM, Kowalski PM, Kegler P, Schlenz H, Bosbach D, Deissmann G. New insights into phosphate based materials for the immobilisation of actinides. RADIOCHIM ACTA 2017. [DOI: 10.1515/ract-2017-2819] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
This paper focuses on major phosphate-based ceramic materials relevant for the immobilisation of Pu, minor actinides, fission and activation products. Key points addressed include the recent progress regarding synthesis methods, the formation of solid solutions by structural incorporation of actinides or their non-radioactive surrogates and waste form fabrication by advanced sintering techniques. Particular attention is paid to the properties that govern the long-term stability of the waste forms under conditions relevant to geological disposal. The paper highlights the benefits gained from synergies of state-of-the-art experimental approaches and advanced atomistic modeling tools for addressing properties and stability of f-element-bearing phosphate materials. In conclusion, this article provides a perspective on the recent advancements in the understanding of phosphate based ceramics and their properties with respect to their application as nuclear waste forms.
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Affiliation(s)
- Stefan Neumeier
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research – Nuclear Waste Management and Reactor Safety (IEK-6) , 52425 Jülich , Germany ; JARA High-Performance Computing , Schinkelstrasse 2 , 52062 Aachen , Germany
| | - Yulia Arinicheva
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research – Nuclear Waste Management and Reactor Safety (IEK-6) , 52425 Jülich , Germany ; JARA High-Performance Computing , Schinkelstrasse 2 , 52062 Aachen , Germany
- Forschungszentrum Jülich, Institute of Energy and Climate Research – Materials Synthesis and Processing (IEK-1) , 52425 Jülich , Germany
| | - Yaqi Ji
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research – Nuclear Waste Management and Reactor Safety (IEK-6) , 52425 Jülich , Germany ; JARA High-Performance Computing , Schinkelstrasse 2 , 52062 Aachen , Germany
| | - Julia M. Heuser
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research – Nuclear Waste Management and Reactor Safety (IEK-6) , 52425 Jülich , Germany ; JARA High-Performance Computing , Schinkelstrasse 2 , 52062 Aachen , Germany
- Karlsruhe Institute of Technology, Institute for Applied Materials (IAM) , 76021 Karlsruhe , Germany
| | - Piotr M. Kowalski
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research – Nuclear Waste Management and Reactor Safety (IEK-6) , 52425 Jülich , Germany ; JARA High-Performance Computing , Schinkelstrasse 2 , 52062 Aachen , Germany
| | - Philip Kegler
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research – Nuclear Waste Management and Reactor Safety (IEK-6) , 52425 Jülich , Germany ; JARA High-Performance Computing , Schinkelstrasse 2 , 52062 Aachen , Germany
| | - Hartmut Schlenz
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research – Nuclear Waste Management and Reactor Safety (IEK-6) , 52425 Jülich , Germany ; JARA High-Performance Computing , Schinkelstrasse 2 , 52062 Aachen , Germany
| | - Dirk Bosbach
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research – Nuclear Waste Management and Reactor Safety (IEK-6) , 52425 Jülich , Germany ; JARA High-Performance Computing , Schinkelstrasse 2 , 52062 Aachen , Germany
| | - Guido Deissmann
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research – Nuclear Waste Management and Reactor Safety (IEK-6) , 52425 Jülich , Germany ; JARA High-Performance Computing , Schinkelstrasse 2 , 52062 Aachen , Germany
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