Abstract
Using X-ray powder diffraction and thermal analysis (TG–DSC), samples of the quasi-ternary system Li2O–Mn2O3–Eu2O3, synthesized from precursors subjected to preliminary mechanochemical activation and annealed in air at 700–1100°C, have been studied. An assessment is given of the possibility of Mn for Eu substitution in the spinel LiMn2 – xEuxO4. A subsolidus isobaric diagram of the Li2O–Mn2O3–Eu2O3 system was constructed. Using models of polythermal sections LiEuO2–LiMnO2 and LiEuO2–LiMn2O4, a projection of the liquidus surface of the quasi-ternary system Li2O–Mn2O3–Eu2O3 was obtained. The temperatures of eutectic and peritectic equilibria involving three crystalline phases and a melt have been determined.
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ACKNOWLEDGMENTS
Elemental analysis (ICP-MS) was performed using the scientific equipment of the Research Chemical Analytical Center of the National Research Center “Kurchatov Institute.”
Funding
The study was supported by the Russian Science Foundation (project no. 23-23-00576).
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Supplementary Information
Fig. S1. X-ray powder diffraction patterns of samples of the LiEuO2–Li2MnO3 section, 1100°C, \({{p}_{{{{{\text{O}}}_{2}}}}}\) = 21 kPa.
Fig. S2. X-ray powder diffraction patterns of samples of the LiEuO2–LiMnO2 section, 1100°C, \({{p}_{{{{{\text{O}}}_{2}}}}}\) = 21 kPa.
Fig. S3. X-ray powder diffraction patterns of samples of the LiEuO2–LiMn2O4 section, 1000°C, \({{p}_{{{{{\text{O}}}_{2}}}}}\) = 21 kPa.
Fig. S4. X-ray powder diffraction patterns of samples of the LiEuO2–LiMn2O4 section, 1100°C, \({{p}_{{{{{\text{O}}}_{2}}}}}\) = 21 kPa.
Fig. S5. Substitution of Mn for Eu in spinel LiMn2O4, 700–1000°C, \({{p}_{{{{{\text{O}}}_{2}}}}}\) = 21 kPa.
Fig. S6. TG–DSC data for samples of the LiEuO2–Li2MnO3 section obtained at 1100°C in air.
Fig. S7. TG–DSC data for samples of the LiEuO2–LiMnO2 section obtained at 1100°C in air.
Fig. S8. TG–DSC data for samples of the LiEuO2–LiMn2O4 section obtained at 1100°C in air.
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Buzanov, G.A., Nipan, G.D. Phase Equilibria in Quasi-Ternary System Li2O–Mn2O3–Eu2O3. Russ. J. Inorg. Chem. (2024). https://doi.org/10.1134/S0036023623602829
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DOI: https://doi.org/10.1134/S0036023623602829