Phase diagram of SrO–InO1.5–CoOx and a new compound Sr3In0.9Co1.1O6
| Autor: | Chun-Keung Loong, Yingxia Wang, Jianhua Lin, Denis Sheptyakov, Kuo Li |
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| Rok vydání: | 2011 |
| Předmět: |
Spin states
Chemistry Neutron diffraction Condensed Matter Physics Trigonal prismatic molecular geometry Electronic Optical and Magnetic Materials Inorganic Chemistry Paramagnetism Crystallography Octahedron Materials Chemistry Ceramics and Composites Diamagnetism Physical and Theoretical Chemistry Isostructural Phase diagram |
| Zdroj: | Journal of Solid State Chemistry. 184:888-892 |
| ISSN: | 0022-4596 |
| DOI: | 10.1016/j.jssc.2011.02.024 |
| Popis: | Sr3In0.9Co1.1O6, isostructural to Ca3Co2O6, is revealed by the study of the phase relations in the system SrO–InO1.5–CoOx (1000 °C). The structure of Sr3In0.9Co1.1O6 is refined by the combination of powder X-ray and neutron diffraction. Sr3In0.9Co1.1O6 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)O3 chains running along the c-axis constructed by alternating face-sharing CoO6 octahedra and (In0.9Co0.1)O6 trigonal prisms. The co-occupation of In3+ and Co3+ at the trigonal prismatic site is evidenced by elementary analysis and determined by the structure refinement. Sr3In0.9Co1.1O6 is paramagnetic, and the susceptibility is consistent with the occupation of Co3+ at 10% of the trigonal prismatic positions in a high spin state (HS, S=2). The HS Co3+ is well separated by diamagnetic CoO6 octahedra and InO6 trigonal prisms and shows a g factor of 2.0 in the magnetic measurements. |
| Databáze: | OpenAIRE |
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