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Powder Neutron and X-Ray Diffraction Study of La4Co3O10,00

O. H. Hansteen, H. Fjellvåg, and B. C. Hauback

Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Oslo, N-0315 Oslo, Norway


Abstract: The crystal structure of stoichiometric La4Co3O10,00 is of the Ruddlesden-Popper type and contains slabs of triple perovskite-type layers separated by rock salt layers, the composition corresponding to n = 3 in the An+1BnO3n+1 series. On heating, the slightly orthorhombically deformed structure converts into a tetragonal one at around 840 K. Antiferromagnetic ordering occurs below TN ≈ 10 K. Crystal structure data from powder neutron diffraction are presented. Slight line broadening of some X-ray reflections and a few, weak additional neutron reflections indicates that the true symmetry is lower than Fmmm.

Full paper in Portable Document Format: 521a7.pdf


Chemical Papers 52 (1) 7–11 (1998)

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