Phase formation at synthesis of murataite-crichtonite ceramics

Yudintsev, S. V.; Stefanovsky, S. V.; Никонов, Б. С.; Stefanovsky, O.I.; Nickolsky, Maximilian S.; Skvortsov, M. V.

doi:10.1016/j.jnucmat.2019.02.013

Cited by 11 publications

(1 citation statement)

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“…In melted ceramics, murataite forms zoned crystals with pyrochlore or murataite 5C at the center, and murataite 8C or 3C towards the edges ( Figure 5 ). In samples obtained by sintering, murataite 5C and murataite 8C formed separate grains [ 132 ]. The pyrochlore module is responsible for actinide content, and the murataite block is responsible for corrosion products (Fe, Al, Mn).…”

Section: Zirconolite and Murataite As Matrices For The Immobilization...mentioning

confidence: 99%

Zirconolite Polytypes and Murataite Polysomes in Matrices for the REE—Actinide Fraction of HLW

et al. 2022

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Electron backscatter diffraction (EBSD) has been used for more than 30 years for analyzing the structure of minerals and artificial substances. In recent times, EBSD has been widely applied for investigation of irradiated nuclear fuel and matrices for the immobilization of radioactive waste. The combination of EBSD and scanning electron microscopy (SEM/EDS) methods allows researchers to obtain simultaneously data on a specimen’s local composition and structure. The article discusses the abilities of SEM/EDS and EBSD techniques to identify zirconolite polytype modifications and members of the polysomatic murataite–pyrochlore series in polyphase ceramic matrices, with simulations of Pu (Th) and the REE-actinide fraction (Nd) of high-level radioactive waste.

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Section: Zirconolite and Murataite As Matrices For The Immobilization...mentioning

confidence: 99%