ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Powder Neutron and X-Ray Diffraction Study of La₄Co₃O_10,00

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 La₄Co₃O_10,00 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 A_n+1B_nO_3n+1 series. On heating, the slightly orthorhombically deformed structure converts into a tetragonal one at around 840 K. Antiferromagnetic ordering occurs below T_N ≈ 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)