Crystal Strucrure of the Mixed Rare Earth Ferrites Pr0,5R0,5FeO3 (R = Nd, Gd, Tb, Dy, Ho)

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Lviv Polytechnic National University
Lviv Polytechnic National University

The work deals with the study of the phase composition and crystal structure of new mixed ferrites Pr0,5R0,5FeO3 (R = Nd, Gd, Tb, Dy, Ho) obtained by solid state reactions technique. It was established that all samples synthesized adopt orthorhombic perovskite structure isotypic with GdFeO3. Unit cell dimensions and atomic coordinates of the mixed rare earth ferrites derived by full profile Rietveld refinement technique agree well with the data of the “pure” PrFeO3 and RFeO3 compounds, thus proving formation of continuous solid solutions Pr1-xRxFeO3 in the PrFeO3 —RFeO3 systems (R = Nd, Gd, Tb, Dy, Ho)

1. Pinto H., Shaked H. Long wavelength neutron diffraction study of the magnetic structures of PrFeO3 and NdFeO3, Solid State Comm, 1972 — 10, P. 663 — 665. 2. W. Slawinski, R. Przenioslo, I. Sosnowska, E. Suard, Spin reorientationand structural changes in NdFeO3, J Phys Condens Matter, 2005 — 17, P. 4605–4 614. 3. C. Shivakumara, Low temperature synthesis and characterization of rare earth orthoferrites LnFeO3 (Ln = La, Pr and Nd) from molten NaOH flux, Solid State Comm, 2006 — 139, P. 165–169. 4. C. Sun, R. Hui, J. Roller, Cathode materials for solid oxide fuel cells: a review, J Solid State Electrochem, 2010 — 4, P. 1125— 1144. 5. P. Ciambelli, S. Cimino, S. De Rossi, AFeO3 (A = La, Nd, Sm) and LaFe1-xMgxO3 perovskites as methane combustion and CO oxidation catalysts: structural, redox and catalytic properties, Appl Catal B: Environmental, 2001 — 29, P. 239–250. 6. J. Ding, X. Lü, H. Shu, J. Xie, H. Zhang, Microwave-assisted synthesis of perovskite ReFeO3 (Re: La, Sm, Eu, Gd) photocatalyst, Mater Sci Eng B, 2010 — 171, P. 31–34. 7. O. Pavlovska, L. Vasulechko, Crustal structure of solid solutions La1-xRxFeO3 (R = Pr, Nd), Visnyk Lviv Polytechnic Natl University, 2016 — 818, P. 250–255. 8. L. Akselrud, Yu. Grin, WinCSD: software package for crystallographic calculations (Version 4), J. Appl. Cryst, 2014. — 47, P. 803–805.