Nonstoichiometry, Structure, and Electrical Properties of “SrPrO3”

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
Hauptverfasser: Thundathil, Mary A, Jones, Camille Y, Snyder, G. Jeffrey, Haile, Sossina M
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Jones, Camille Y
Snyder, G. Jeffrey
Haile, Sossina M
description 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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