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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Dacheux, Nicolas
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (17/17 displayed)
- 2024Speciation and chemical behavior of molybdenum in uranium dioxide samples prepared by hydroxide precipitationcitations
- 2024Speciation and chemical behavior of molybdenum in uranium dioxide samples prepared by hydroxide precipitationcitations
- 2023Synthesis and sintering of homogenous Hf1-xMIIIxO2-x/2 ceramics as solid electrolytes for oxygen sensors in liquid sodium
- 2023Understanding the solid/liquid interface evolution during the dissolution of Nd-doped UO2 by macro-/microscopic dual approachcitations
- 2022Synchrotron study of the relations between sintering conditions, structure and cation speciation in (U,Ce)O2+δ ceramics
- 2022Synthesis and sintering of homogenous Hf1-xMIIIxO2-x/2 ceramics as solid electrolytes for oxygen sensors operating in liquid sodium
- 2022Experimental approach to study the alteration of MOX MIMAS fuels in an underwater storage situation
- 2022Characterization and dissolution of (Ru, Rh, Pd, Mo)-bearing (U,Th)O2 heterogeneous mixed oxides for spent fuel modeling
- 2022Impact of impurities on the fabrication and performances of yttrium-doped thoria electrolyte ceramicscitations
- 2021The Role of Water and Hydroxyl Groups in the Structures of Stetindite and Coffinite, MSiO4 (M = Ce, U).citations
- 2020An in-situ electron microscopy study of dual ion-beam irradiated xenotime-type ErPO$_4$citations
- 2019Deciphering the Crystal Structure of a Scarce 1D Polymeric Thorium Peroxo Sulfate
- 2019Impact of the cationic homogeneity on Th0.5U0.5O2 densification and chemical durabilitycitations
- 2019Impact of the cationic homogeneity on Th$_{0.5}$U$_{0.5}$O$_2$ densification and chemical durabilitycitations
- 2017Synthesis and Direct Sintering of Nanosized (M IV ,M III )O 2‐ x Hydrated Oxides as Electrolyte Ceramicscitations
- 2017Study of the hydrothermal synthesis of ThSiO4, USiO4 and CeSiO4 aiming at determining the conditions of PuSiO4 formation
- 2017Novel approaches for the in situ study of the sintering of nuclear oxide fuel materials and their surrogatescitations
Places of action
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conferencepaper
Study of the hydrothermal synthesis of ThSiO4, USiO4 and CeSiO4 aiming at determining the conditions of PuSiO4 formation
Abstract
Thorite, ThSiO4, and coffinite, USiO4, are two naturally occurring phases which were extensively studied because of their abundance in the environment [1]. The supposed formation mechanism of natural coffinite implies the alteration of oxide phases in reductive and silica rich media. It rose important questions about the actinides' behaviour consequently to the alteration of spent nuclear fuel under geologic repository conditions [2]. Indeed, silicate compounds' formation has been suspected for Pu-containing precipitates observed in basic media and for plutonium borosilicate glasses altered by vapour hydration. However, even if PuSiO4 has already been hydrothermally synthesized once [3], the favourable conditions for the formation of this phase and its stability domain are not well constrained. To provide more data on the Pu system and to determine suitable synthesis conditions, three surrogates, CeSiO4, ThSiO4 and USiO4, which crystallize in the same zircon type-structure (space group I41/amd) [3,4] than PuSiO4, were investigated. Optimized conditions of synthesis were determined for these three silicate-based systems by varying several experimental parameters so that they could be transposed to the plutonium system. [1] A. Mesbah et al., Inorganic Chemistry, 54, 6687-6696, 2015 [2] J. Janeczek, R. Ewing, Materials Research Society, Symposium Proceedings, 257, 497-504, 1992 [3] C. Keller, Nukleonik, 5, 41-48, 1963 [4] J. Skakle et al., Powder Diffraction, 15, 234-238, 2000