Crystal structure and magnetic properties of the solid-solution phase Ca{sub 3}Co{sub 2-} {sub v} Sc {sub v} O{sub 6}

Journal Article · Thu Mar 15 00:00:00 EDT 2007 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2006.12.007· OSTI ID:21015718

Fredenborg, Vivian Miksch ^[1]; Kjekshus, Arne ^[1]; Fjellvag, Helmer ^[1]; Hauback, Bjorn C ^[2]

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1. Centre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, N-0315 Oslo (Norway)
2. Institute for Energy Technology, N-2007 Kjeller (Norway)

The two crystallographically non-equivalent Co atoms of the quasi-one-dimensional crystal structure of Ca{sub 3}Co{sub 2}O{sub 6} form chains with alternating, face-sharing polyhedra of Co2O{sub 6} trigonal prisms and Co1O{sub 6} octahedra. This compound forms a substitutional solid-solution phase with Sc, in which the Sc atoms enter the Co2 sublattice exclusively. The homogeneity range of Ca{sub 3}Co{sub 2-} {sub v} Sc {sub v} O{sub 6} (more specifically Ca{sub 3}Co1Co2{sub 1-} {sub v} Sc {sub v} O{sub 6}) extends up to v{approx}0.55. The crystal structure belongs to space group R3-barc with lattice parameters (in hexagonal setting): 9.0846(3){<=}a{<=}9.1300(2) A and 10.3885(4){<=}c{<=}10.4677(4) A. The magnetic moment decreases rapidly with increasing amount of the non-magnetic Sc solute in the lattice. - Graphical abstract: The quasi-one-dimensional Ca{sub 3}Co{sub 2}O{sub 6} phase forms a substitutional solid-solution system with Sc, in which the Sc atoms enter the Co2 sublattice exclusively. The homogeneity range of Ca{sub 3}Co{sub 2-} {sub v} Sc {sub v} O{sub 6} extends up to v{approx}0.55. The magnetic moment decreases rapidly with increasing amount of the non-magnetic Sc solute in the lattice.

• OSTI ID: 21015718
• Journal Information: Journal of Solid State Chemistry, Vol. 180, Issue 3; Other Information: DOI: 10.1016/j.jssc.2006.12.007; PII: S0022-4596(06)00640-2; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CALCIUM COMPOUNDS
COBALT COMPOUNDS
LATTICE PARAMETERS
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
OXIDES
SCANDIUM COMPOUNDS
SOLID SOLUTIONS
SPACE GROUPS
TRIGONAL LATTICES