title: Crystal Structure of LaSr3Fe3O8(OH)2·xH2O.
abstract: The crystal structure of the hydrated Ruddlesden-Popper (RP) phase LaSr3Fe3O8(OH)2·xH2O has been investigated with focus on the orientation of the hydroxide groups and intercalated water. Combined powder synchrotron X-ray and neutron diffraction techniques were used. On the basis of Rietveld refinements and Fourier maps, intercalated water was found to form a network within the rock-salt-type layers of the RP phase with a likely dynamic interchange between different orientations. The water content was determined at different temperatures using thermogravimetric analysis, with findings showing that the water occupation follows a linear temperature dependence. The magnetic properties of LaSr3Fe3O8(OH)2·xH2O are significantly influenced by hydration, but no long-range order was observed. The relationship between the physical properties and crystal structure is discussed in detail.
authors.affiliation: Department of Chemistry, Centre for Materials Science and Nanotechnology, University of Oslo , P.O. Box 1033, N-0315 Oslo, Norway.
authors.forename: Vegar
authors.initials: V
authors.lastname: Øygarden
authors.affiliation: Department of Chemistry, Centre for Materials Science and Nanotechnology, University of Oslo , P.O. Box 1033, N-0315 Oslo, Norway.
authors.forename: Helmer
authors.initials: H
authors.lastname: Fjellvåg
authors.affiliation: Department of Physics, Institute for Energy Technology , N-2007 Kjeller, Norway.
authors.forename: Magnus H
authors.initials: MH
authors.lastname: Sørby
authors.affiliation: Department of Chemistry, Centre for Materials Science and Nanotechnology, University of Oslo , P.O. Box 1033, N-0315 Oslo, Norway.
authors.forename: Anja O
authors.initials: AO
authors.lastname: Sjåstad