Characterization of Zr-bearing crystalline phases from Rb-bearing model matrix materials
V.E. Eremyashev, G.G. Korinevskaya, S.M. Lebedeva, M.A. Rassomakhin
| UDK 544.23:543.42 | https://doi.org/10.35597/2313-545X-2023-9-4-5 | Read PDF (RUS) |
As part of the synthesis of new matrix materials for vitrifcation of highly active radioactive wastes, the crystalline phases formed during rapid cooling from melts of the Na2O–Rb2O–SrO(Ba)–B2O3– SiO2–Al2O3–ZrO2 system with a high Rb and Zr content (up to 10 mol. %) are found and studied. The presence of numerous Zr and Rb-bearing crystals in samples is established by electron microscopy, X-ray diffraction and Raman spectroscopy; their morphology, chemical composition and spectral characteristics are studied. It is concluded that these crystalline phases form due to the excessive content of individual components of the melt and their formation is responsible for the undesirable fnal local heterogeneity and crystallization of matrix materials.
Keywords: radioactive waste, immobilization, matrix materials, crystallization, rubidium, zirconium.
Received 01.12.2023, accepted 08.12.2023
V.E. Eremyashev, South Urals Federal Research Center of Mineralogy and Geoecology UB RAS, Institute of Mineralogy, Miass, Chelyabinsk district, Russia;
South Ural State University (National Research University), Russia; vee-zlat@mail.ru, vee-zlat@mineralogy.ru
G.G. Korinevskaya, South Urals Federal Research Center of Mineralogy and Geoecology UB RAS, Institute of Mineralogy, Miass, Chelyabinsk district, Russia;
South Ural State University (National Research University), Russia;
S.M. Lebedeva, South Urals Federal Research Center of Mineralogy and Geoecology UB RAS, Institute of Mineralogy, Miass, Chelyabinsk district, Russia;
M.A. Rassomakhin, South Urals Federal Research Center of Mineralogy and Geoecology UB RAS, Institute of Mineralogy, Miass, Chelyabinsk district, Russia
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MINERALOGY 4 2023