Phase diagram of SrO-InO{sub 1.5}-CoO{sub x} and a new compound Sr{sub 3}In{sub 0.9}Co{sub 1.1}O{sub 6}

Journal Article · Fri Apr 15 04:00:00 EDT 2011 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2011.02.024· OSTI ID:21494254

Li, Kuo ^[1]; Sheptyakov, Denis ^[2]; Wang, Yingxia ^[1]; Loong, Chun-Keung ^[1]; Lin, Jianhua ^[1]

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1. Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P R China (China)
2. Laboratory for Neutron Scattering, Paul Scherrer Institut, CH-5232 Villigen PSI (Switzerland)

Sr{sub 3}In{sub 0.9}Co{sub 1.1}O{sub 6}, isostructural to Ca{sub 3}Co{sub 2}O{sub 6}, is revealed by the study of the phase relations in the system SrO-InO{sub 1.5}-CoO{sub x} (1000 {sup o}C). The structure of Sr{sub 3}In{sub 0.9}Co{sub 1.1}O{sub 6} is refined by the combination of powder X-ray and neutron diffraction. Sr{sub 3}In{sub 0.9}Co{sub 1.1}O{sub 6} crystallizes in a trigonal lattice with the cell parameters a=b=9.59438(3) A, c=11.02172(4) A with the space group R-3c. Its structure possesses 1D (In/Co)O{sub 3} chains running along the c-axis constructed by alternating face-sharing CoO{sub 6} octahedra and (In{sub 0.9}Co{sub 0.1})O{sub 6} trigonal prisms. The co-occupation of In{sup 3+} and Co{sup 3+} at the trigonal prismatic site is evidenced by elementary analysis and determined by the structure refinement. Sr{sub 3}In{sub 0.9}Co{sub 1.1}O{sub 6} is paramagnetic, and the susceptibility is consistent with the occupation of Co{sup 3+} at 10% of the trigonal prismatic positions in a high spin state (HS, S=2). The HS Co{sup 3+} is well separated by diamagnetic CoO{sub 6} octahedra and InO{sub 6} trigonal prisms and shows a g factor of 2.0 in the magnetic measurements. -- Graphical abstract: Sr{sub 3}In{sub 0.9}Co{sub 1.1}O{sub 6} possesses 1D chains constructed by alternating face-sharing CoO{sub 6} octahedra and (In{sub 0.9}Co{sub 0.1})O{sub 6} trigonal prisms. The high spin Co{sup 3+} (S=2) in trigonal prism shows a g factor of 2.0. Display Omitted Research highlights: {yields} Phase diagram of SrO-InO{sub 1.5-}CoO{sub x} at 1000 {sup o}C in air atmosphere is presented. {yields} A new compound Sr{sub 3}In{sub 0.9}Co{sub 1.1}O{sub 6} that is isostructural to Ca{sub 3}Co{sub 2}O{sub 6} is revealed. {yields} 1D chain is formed by alternating face-sharing CoO{sub 6} octahedra and (In{sub 0.9}Co{sub 0.1})O{sub 6} trigonal prisms.{yields} Co{sup 3+} at trigonal prismatic site is in high spin state (S=2) with a g factor of 2.0.

• OSTI ID: 21494254
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 4 Vol. 184; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CHARGED PARTICLES
COBALT COMPOUNDS
COBALT IONS
COBALT OXIDES
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIAGRAMS
DIFFRACTION
DIMENSIONLESS NUMBERS
INDIUM COMPOUNDS
INDIUM IONS
INDIUM OXIDES
INFORMATION
IONS
LANDE FACTOR
MAGNETIC PROPERTIES
MAGNETISM
MINERALS
NEUTRON DIFFRACTION
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PARAMAGNETISM
PEROVSKITE
PEROVSKITES
PHASE DIAGRAMS
PHYSICAL PROPERTIES
SCATTERING
SPACE GROUPS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SYMMETRY GROUPS
TRANSITION ELEMENT COMPOUNDS
TRIGONAL LATTICES
X-RAY DIFFRACTION