Structural characterization of Pu-bearing murataite ceramic

Yudintsev, S. V.; Stefanovsky, S. V.; Никонов, Б. С.; Maslakov, K. I.; Ptashkin, A.G.

doi:10.1016/j.jallcom.2006.10.129

Cited by 6 publications

(1 citation statement)

References 11 publications

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“…Data on murataite matrices have been reported in many publications (Laverov et al, 1999(Laverov et al, , 2003(Laverov et al, , 2006Lian et al, 2005;Stefanovsky et al, 2007aStefanovsky et al, , 2007bYudintsev et al, 2007). The highest murataite content is reached in ceramics of the following composition, wt %: 55 TiO 2 , 10 MnO, 10 CaO, 5 Al 2 O 3 , 5 Fe 2 O 3 , 5 ZrO 2 , 10 actinide and REE oxides.…”

Section: Results Of Previous Investigations Of Murataitementioning

confidence: 94%

Modular nature of the polysomatic pyrochlore-murataite series

et al. 2011

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Synthetic analogues of murataite, a very rare mineral-a complex oxide of REE, actinide, Ti, Fe, and other elements,-are of great interest as confinement matrices of radioactive wastes. They are produced by sintering (1200-1300°C) and melting (1500-1600°C) with subsequent crystallization of the melt. Four structural varieties of murataite distinguished by unit cell parameters have been established by TEM study. All these varieties are derivatives of the fluorite structure designated as murataite 3C, 5C, 7C, and 8C depend ing on repetition factor of a parameter of the fluorite subcell. The structural features of the synthetic murataite varieties are analyzed in this paper based on data obtained from high resolution electron micros copy, microdiffraction, and X ray refinement. The hypothesis of a modular structure of the members of poly somatic pyrochlore-murataite series has been confirmed. At the same time, the structural modules are zero dimensional rather than two dimensional as had previously been suggested. The combinations of zero dimensional modules in 3D space create the entire structural diversity of the polysomatic series.

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