journal article·2023-10

Lattice parameters of fluorite-structured uranium–americium mixed oxides

Romain Vauchy, Shun Hirooka, Masashi Watanabe, Keisuke Yokoyama, Tatsutoshi Murakami

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Abstract

The room temperature lattice parameters of fluorite-structured U 1–yAm yO 2 uranium–americium mixed oxides were confronted with our crystallographic hybrid model. The complex charge compensation mechanisms that take place in this solid solution were considered to shed light on the available experimental unit-cell values. The effects of α self-irradiation, deviation from stoichiometry, and neptunium content on the lattice constants were also estimated.
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Research context

OpenAlex topics: Nuclear Materials and Properties · Nuclear materials and radiation effects · Radioactive element chemistry and processing

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References (78)

Show source-provided references
1. 5.19 - Actinide-Bearing Fuels and Transmutation Targets☆
2. Influence of O/M ratio on sintering behavior of (U0.8,Pu0.2)O2±x10.1016/j.jnucmat.2011.02.050 ↗
3. Influence of the oxygen potential on the sintering of UO2–45% PuO210.1016/j.jeurceramsoc.2015.05.006 ↗
4. Effect of cooling rate on achieving thermodynamic equilibrium in uranium–plutonium mixed oxides10.1016/j.jnucmat.2015.11.049 ↗
5. Effect of O/M ratio on sintering behavior of (Pu0.3U0.7)O2−x10.1016/j.jnucmat.2020.152188 ↗
6. Oxygen potential of neodymium-doped U0.817Pu0.180Am0.003O2±x uranium–plutonium–americium mixed oxides at 1573, 1773, and 1873 K10.1016/j.jnucmat.2023.154416 ↗
7. A thermodynamic study of the uranium–americium oxide U0.5Am0.5O2±x10.1016/0022-3115(83)90228-3 ↗
8. On the valency state of americium in (U0.5Am0.5)O2−x10.1016/0925-8388(94)90960-1 ↗
9. Accommodation of multivalent cations in fluorite-type solid solutions: case of Am-bearing UO210.1016/j.jnucmat.2012.11.037 ↗
10. Lattice parameter functions of (AmyU1−y)O2−x based on XRD and XANES measurements10.1016/j.jssc.2017.09.011 ↗
11. Extreme multi-valence states in mixed actinide oxides10.1038/s42004-019-0161-0 ↗
12. Room-temperature oxidation of hypostoichiometric uranium–plutonium mixed oxides U1−yPuyO2−x – A depth-selective approach10.1016/j.jnucmat.2015.05.033 ↗
13. Lebreton · 2014
14. Self-irradiation effects in americium oxides10.1016/0020-1650(77)80091-3 ↗
15. Self-radiation damage in plutonium and uranium mixed dioxide10.1016/j.jnucmat.2009.05.020 ↗
16. Annealing behavior of (Pu,Cm)O2 lattice and bulk expansion from self-irradiation damage10.1016/j.jnucmat.2011.02.060 ↗
17. High temperature X-ray diffraction study of the oxidation products and kinetics of uranium–plutonium mixed oxides10.1021/ic501580x ↗
18. Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides10.1107/S0567739476001551 ↗
19. Lattice parameters of (U, Pu, Am, Np)O2−x10.1016/j.jnucmat.2008.09.037 ↗
20. Breaking the hard-sphere model with fluorite and antifluorite solid solutions10.1038/s41598-023-29326-0 ↗
21. Klein · 2007
22. Structure of mixed U(IV)-An(III) precursors synthesized by co-conversion methods (where An = Pu, Am or Cm)10.1016/j.jnucmat.2008.10.039 ↗
23. Synthesis of americium mononitride by carbothermic reduction method
24. Valence state of Am in (U0.95Am0.05)O2.010.1016/j.jnucmat.2011.07.016 ↗
25. Self-irradiation effects in dense and tailored porosity U1−yAmyO2−x (y=0.10; 0.15) compounds10.1016/j.jnucmat.2010.12.314 ↗
26. Fabrication and characterisation of U0.85Am0.15O2−x discs for MARIOS irradiation program10.1016/j.jnucmat.2011.05.036 ↗
27. Local structure and charge distribution in mixed uranium–americium oxides: effects of oxygen potential and Am content10.1021/ic200910f ↗
28. Thermal recovery and lattice expansion of self-irradiated U0.80Am0.20O2−x, an in situ high temperature x-ray diffraction study10.1016/j.jssc.2012.12.022 ↗
29. U1−xAmxO2 MABB fabrication in the frame of the DIAMINO irradiation experiment10.1016/j.proche.2012.10.074 ↗
30. Dilatometric study of U1−xAmxO2±δ and U1−xCexO2±δ reactive sintering10.1016/j.jnucmat.2013.05.024 ↗
31. Dilatometric study of U1−xAmxO2±δ sintering: determination of activation energy10.1111/jace.12642 ↗
32. XRD monitoring of α self-irradiation in uranium–americium mixed oxides10.1021/ic402124s ↗
33. Americium-based oxides: dense pellet fabrication from co-converted oxalates10.1016/j.jnucmat.2013.09.028 ↗
34. Fabrication and characterization of (U, Am)O2−x transmutation targets10.1016/j.jnucmat.2011.11.055 ↗
35. In situ study of the solid-state formation of U1−xAmxO2±δ solid solution10.1021/ic301124d ↗
36. Fabrication and characterization of U1−xAmxO2±δ compounds with high americium contents (x = 0.3, 0.4 and 0.5)10.1016/j.jnucmat.2013.03.074 ↗
37. Peculiar behavior of (U,Am)O2−δ compounds for high americium contents evidenced by XRD, XAS, and Raman spectroscopy10.1021/acs.inorgchem.5b01357 ↗
38. Fabrication of uranium–americium mixed oxide pellet from microsphere precursors: application of CRMP process10.1016/j.jnucmat.2014.06.048 ↗
39. Heat capacity, thermal conductivity and thermal diffusivity of uranium–americium mixed oxides10.1016/j.jallcom.2014.05.083 ↗
40. Caisso · 2015 · 44 · 6391
41. Fabrication of (U,Am)O2 pellet with controlled porosity from oxide microspheres10.1016/j.jnucmat.2017.05.005 ↗
42. High temperature heat capacity of (U,Am)O2±x10.1016/j.jnucmat.2017.07.009 ↗
43. Epifano · 2017
44. Hydrothermal decomposition of actinide(IV) oxalates: a new aqueous route towards reactive actinide oxide nanocrystals10.1515/chem-2016-0018 ↗
45. Synthesis and characterization of homogeneous (U,Am)O2 and (U,Pu,Am)O2 nanopowders10.1039/D2CE00527A ↗
46. Low-temperature heat capacity and magnetism in (U1−yLny)O2 and (U1−yAmy)O2 (y = 0.01 − 0.05) solid solutions: effects of substitution and self-irradiation10.1063/5.0112674 ↗
47. 20 years of production of UO2 by the Integrated Dry Route – A BNFL perspective on dry conversion
48. Accurate lattice parameter measurements of stoichiometric uranium dioxide10.1016/j.jnucmat.2015.01.029 ↗
49. Lattice thermal expansion of Pu1−yAmyO2−x plutonium–americium mixed oxides10.1107/S1600576717014832 ↗
50. Syntheses, structures, and spectroscopic properties of plutonium and americium phosphites and the redetermination of the ionic radii of Pu(III) and Am(III)10.1021/ic300958z ↗
51. Structural, electronic and energetic properties of uranium–americium mixed oxides U1−yAmyO2 using DFT+U calculations10.1088/1361-648X/ab395e ↗
52. Development of an interatomic potential for mixed uranium-americium oxides and application to the determination of the structural and thermodynamic properties of (U,Am)O2 with americium contents below 50%10.1016/j.jnucmat.2023.154390 ↗
53. Actinide oxidation state and O/M ratio in hypostoichiometric uranium–plutonium–americium U0.750Pu0.246Am0.004O2−x mixed oxides10.1021/acs.inorgchem.5b02533 ↗
54. Charge compensation mechanisms in U1−xGdxO2 and Th1−xGdxO2−x/2 studied by X-ray Absorption Spectroscopy10.1016/j.jnucmat.2017.03.042 ↗
55. On the O-rich domain of the U−Am−O phase diagram10.1016/j.jnucmat.2020.151986 ↗
56. 1976
57. Studying radiotoxic materials by high temperature X-ray diffraction10.1016/j.apmt.2016.03.005 ↗
58. New sample stage for characterizing radioactive materials by X-ray powder diffraction: application on five actinide dioxides ThO2, UO2, NpO2, PuO2 and AmO210.1107/S1600576721002235 ↗
59. Structural investigation on an aged americium transmutation fuel10.1016/j.jnucmat.2007.01.082 ↗
60. Self-radiation effects on the lattice parameter of 244CmO210.1016/0020-1650(71)80177-0 ↗
61. Self-radiation effects on the lattice parameter of 238PuO210.1016/0020-1650(74)80211-4 ↗
62. Alpha-irradiation damage in CeO2, UO2 and PuO210.1080/00337578408215798 ↗
63. In situ high temperature X-ray diffraction study of the phase equilibria in the UO2–PuO2–Pu2O3 system10.1016/j.jnucmat.2015.06.034 ↗
64. Influence of phase separation on the oxidation of (U,Pu)O2–x10.1021/acs.jpcc.5b07407 ↗
65. Size of oxide vacancies in fluorite and perovskite structured oxides10.1007/s10832-014-9916-2 ↗
66. Cation interdiffusion in uranium–plutonium mixed oxide fuels: where are we now?10.3389/fnuen.2022.1060218 ↗
67. Recovery of americium-241 fom aged plutonium metal
68. Status of americium-241 recovery and purification at the Los Alamos National Laboratory, in: transplutonium Elem. Recovery
69. The separation of 241Am from aged plutonium dioxide for use in radioisotope power systems using the AMPPEX Process10.1016/j.proche.2016.10.020 ↗
70. Impact of the cation distribution homogeneity on the americium oxidation state in the U0.54Pu0.45Am0.01O2−x mixed oxide10.1016/j.jnucmat.2014.09.014 ↗
71. Thermal expansion of neptunium–plutonium mixed oxides10.1016/S0925-8388(98)00099-1 ↗
72. Phase relationships in the U–Np–O system10.1016/j.proche.2012.10.072 ↗
73. High-temperature X-ray diffraction study of uranium–neptunium mixed oxides10.1021/ic302457m ↗
74. A combined TIMS and ICP-MS study for Th0.5Np0.5O2 thorium neptunium mixed oxide analysis10.1016/j.ijms.2020.116479 ↗
75. In situ X-ray diffraction study of point defects in neptunium dioxide at elevated temperature10.1107/S1600576714007912 ↗
76. The variables to influence the temporal drift of stoichiometry in FBR mixed oxide fuel10.1016/0022-3115(84)90004-7 ↗
77. Raman microspectroscopic studies of unirradiated homogeneous (U0.76Pu0.24)O2+x: the effects of Pu content, non-stoichiometry, self-radiation damage and secondary phases10.1002/jrs.5092 ↗
78. Characterization of un-irradiated MIMAS MOX fuel by Raman spectroscopy and EPMA10.1016/j.jnucmat.2017.11.014 ↗