Characterization of modified murataite based ceramics as a perspective hosts for actinides, fission, and corrosion products of HLW
Source abstract
Abstract
Abstract Murataite-based ceramics containing 10 wt% rare earth (REs = La, Ce, Nd, Ho) or actinide (An = Th, U) oxides were produced in a resistive furnace at a temperature of 1500 °C. The samples were composed of major murataite-type phases and minor perovskite, crichtonite, and zirconolite/pyrochlore. Light (Ce-group) REs are concentrated in the perovskite whereas Nd and Ho are mainly accommodated in the murataite. U and Th enter predominantly murataite. Ce and U regardless from their oxidation state in the batch (Ce2O3/CeO2, UO2/UO3) exist in the murataite as Ce(III) or U(IV) with some contribution due to U(V) for the uranium-doped sample.
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Research context
OpenAlex topics: Nuclear materials and radiation effects · Advanced Condensed Matter Physics · Nuclear Materials and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (34)
Show source-provided references
1. Synthetic “murataites” as modular members of a pyrochlore–murataite polysomatic series
2. Murataite-based ceramics for actinide waste immobilization10.1557/PROC-556-121 ↗
3. Actinide host phases as radioactive waste forms
4. Murataite, a UB12 derivative structure with condensed Keggin molecules
5. Crystal structure of murataite Mu-5, a member of the murataite-pyrochlore polysomatic series
6. Synthetic murataite-3C, a complex form for long-term immobilization of nuclear waste: crystal structure and its comparison with natural analogues
7. Polysomatism and structural complexity: structure model for murataite-8c, a complex crystalline matrix for the immobilization of high-level radioactive waste10.1127/ejm/2015/0027-2511 ↗
8. Leach resistance of murataite-based ceramics containing actinides10.1016/j.jallcom.2007.01.097 ↗
9. International Atomic Energy Agency · 1985
10. Phase and chemical stability of murataite containing uranium, plutonium and rare earth10.1557/PROC-663-357 ↗
11. A new cubic structure compound10.1007/BF00726485 ↗
12. Phase equilibria of nuclear waste ceramics: the effect of oxygen fugacity10.1111/j.1151-2916.1984.tb09619.x ↗
13. The incorporation of cerium in zirconolite10.1557/PROC-465-333 ↗
14. Structural environments of incompatible elements in silicate glass/melt systems: II. UIV, UV, and UVI10.1016/0016-7037(92)90261-G ↗
15. Raman and x-ray absorption spectroscopy study of the phase evolution induced by mechanical milling and thermal treatments in R2Ti2O7 pyrochlores10.1103/PhysRevB.84.104207 ↗
16. Structural and crystal chemical properties of rare-earth titanate pyrochlores10.1016/j.jallcom.2014.03.153 ↗
17. Order-disorder phase structure, microstructure and aqueous durability of (Gd,Sm)2(Zr,Ce)2O7 pyrochlore ceramics for immobilizing actinides10.1016/j.ceramint.2019.06.006 ↗
18. Murataite as universal matrix for immobilization of actinides10.1134/S1075701506050011 ↗
19. Murataite matrices for actinide wastes10.1134/S1066362211030027 ↗
20. Corrosion resistance of murataite-based ceramics containing simulated actinide/rare earth fraction of high level waste
21. Leaching of neptunium from garnet- and murataite-based ceramics10.1524/ract.2006.94.9-11.509 ↗
22. Radiation and chemical stability of polyphase crystalline matrix based on synthetic murataite for incorporation of actinide wastes10.1134/S1066362208050184 ↗
23. Leach rates of uranium and thorium from murataite ceramics10.1524/ract.2009.1563 ↗
24. Dissolution kinetics of titanium pyrochlore ceramics at 90oC by single-pass-flow-through experiments10.1557/PROC-608-373 ↗
25. Durabilities of pyrochlore-rich titanate ceramics designed for immobilization of surplus plutonium10.1557/PROC-663-325 ↗
26. Experimental determination of the dissolution kinetics of plutonium- and uranium-bearing ceramics at 90oC10.1557/PROC-713-JJ11.38 ↗
27. Dissolution kinetics of pyrochlore ceramics for the disposition of plutonium10.2138/am.2006.1709 ↗
28. Experimental determination of dissolution kinetics of Zr-substituted Gd-Ti pyrochlore ceramics: influence of chemistry on corrosion resistance
29. Titanate ceramic matrices for alumina-rich wastes10.1557/PROC-807-321 ↗
30. Electrical properties of murataite modules with complex and large-volume fluorite-type superstructure10.1016/j.materresbull.2016.08.016 ↗
31. X-ray powder diffraction characterization of the large-volume unit cell of the M8 murataite polytype10.1017/S0885715615000913 ↗
32. Synthesis and characterization of a simpler Mn-free, Fe-rich M3-type murataite10.1016/j.jallcom.2016.12.142 ↗
33. Synchrotron X-ray power diffraction pattern of the M8 murataite polytype10.1017/S0885715617000525 ↗
34. X-Ray photoelectron study of murataite ceramics containing Th, U, Np, and Pu10.1134/S1066362212020026 ↗