Physics of the Solid State
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- 2023
- 2022
X-ray structural analysis of multicomponent oxide powders with a pyrochlore structure using the Rietveld method: features, techniques, limitations
Levin A. A.
1, Lomakin M. S.
1,2, Proskurina O. V.
1,3
1Ioffe Institute, St. Petersburg, Russia
2St. Petersburg State Electrotechnical University “LETI", St. Petersburg, Russia
3Saint-Petersburg State Institute of Technology (Technical University), St. Petersburg, Russia
2St. Petersburg State Electrotechnical University “LETI", St. Petersburg, Russia
3Saint-Petersburg State Institute of Technology (Technical University), St. Petersburg, Russia
Email: aleksandr.a.levin@mail.ioffe.ru, lomakinmakariy@mail.ioffe.ru, proskurinaov@mail.ru
A set of techniques for analyzing multicomponent oxide powders with a pyrochlore structure using the Rietveld method was developed, which allows for precise refinement of the compounds composition in the presence of atoms of different sorts in each of two structurally non-equivalent crystallographic positions ( A and B). The developed method was tested using the example of the Bi2O3-Na2O-Fe2O3-WO3 system and made it possible to determine the precise composition of a compound with a pyrochlore structure in a sample obtained by hydrothermal synthesis - (Bi1.08Na0.08#0.84)(Fe0.44W1.56)O7, where # - cation vacancy. Keywords: multicomponent oxides, pyrochlore structure, X-ray structural analysis of powders, Rietveld method.
- M.S. Lomakin, O.V. Proskurina, A.A. Levin, V.N. Nevedomskiy. Nanosyst.: Phys. Chem. Math. 15, 2, 240-254 (2024). DOI: 10.17586/2220-8054-2024-15-2-240-254
- A.A. Levin, T.A. Smirnova, E.D. Obozova, V.G. Zalesskiy, A.I. Fedoseev, S.G. Lushnikov, Kristallografiya 68, 5, 722-733 (2023). (in Russian). DOI: 10.31857/S0023476123600532
- M.W. Lufaso, T.A. Vanderah, I.M. Pazos, I. Levin, R.S. Roth, J.C. Nino, V. Provenzano, P.K. Schenck, J. Solid State Chem. 179, 12, 3900-3910 (2006). DOI: 10.1016/j.jssc.2006.08.036
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