Abstract
Ceramic Bi1.4Dy0.6O3 and Bi3Nb0.2Sm0.8O6.2 samples were prepared by solid-phase synthesis. The compounds have cubic structures (space group Fm3m). Their standard enthalpies of formation were determined by solution calorimetry, and their lattice enthalpies were calculated. The lattice enthalpies of Bi3Nb0.2R0.8O6.2 compounds decrease in magnitude when erbium is replaced by samarium, due to the lanthanide radius increasing from erbium to samarium. The lattice enthalpy of Bi1.4Dy0.6O3 has a greater magnitude than the lattice enthalpy of Bi1.2Gd0.8O3.
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Funding
This work was supported by the Russian Scientific Foundation (project No. 19-19-00095-P). N.I. Matske-vich, A.N. Semerikova, E.N. Tkachev, M.Yu. Matskevich, O.I. Anufrieva, and P.P. Bezverkhii are thankful to the Ministry of Science and Higher Education of the Russian Federation (project No. 121031700314-5) for access to the calorimeter and synthetic equipment.
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Matskevich, N.I., Semerikova, A.N., Gelfond, N.V. et al. Thermochemical Investigations of Bismuth, Dysprosium, Samarium, and Niobium Oxide Compounds. Russ. J. Inorg. Chem. 68, 190–194 (2023). https://doi.org/10.1134/S0036023622700140
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DOI: https://doi.org/10.1134/S0036023622700140