Nonstoichiometry, Structure, and Electrical Properties of “SrPrO3”
The single-phase composition with the perovskite structure type in the Sr−Pr−O system has been identified as (Sr0.935Pr0.043□0.022)Pr1.0O3 from neutron diffraction refinements, chemical analysis, and thermogravimetric analysis. The cation deficient oxide crystallizes in a GdFeO3-type orthorhombic st...
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| Veröffentlicht in: | Chemistry of materials 2005-10, Vol.17 (20), p.5146-5154 |
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| Hauptverfasser: | , , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | The single-phase composition with the perovskite structure type in the Sr−Pr−O system has been identified as (Sr0.935Pr0.043□0.022)Pr1.0O3 from neutron diffraction refinements, chemical analysis, and thermogravimetric analysis. The cation deficient oxide crystallizes in a GdFeO3-type orthorhombic structure, space group Pbnm, with lattice parameters a = 5.988 00(17), b = 6.121 36(17), c = 8.548 58(24) Å, and Z = 4 at 300 K. Thermogravimetric analysis confirms that the compound is not oxygen deficient. (Sr0.935Pr0.043)Pr1.0O3 exhibits semiconducting behavior. The bulk (grain interior) conductivity at 36 °C is 5.2 × 10-5 S cm-1 with an activation energy for charge transport of 0.26 eV. |
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| ISSN: | 0897-4756 1520-5002 |
| DOI: | 10.1021/cm050895k |