Synthesis and crystallographic characterization of the mixed-valence reduced nickelate La sub 1. 6 Sr sub 0. 4 (Ni sup +I ,Ni sup +II )O sub 3. 47

Crespin, M; Bassat, J M; Odier, P; Mouron, P; Choisnet, J

doi:10.1016/0022-4596(90)90195-4

Title: Synthesis and crystallographic characterization of the mixed-valence reduced nickelate La sub 1. 6 Sr sub 0. 4 (Ni sup +I ,Ni sup +II )O sub 3. 47

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Abstract

The new mixed-valence nickelate La{sub 1.6}Sr{sub 0.4}(Ni{sup +I}, Ni{sup +II})O{sub 3.47} was prepared by low-temperature reduction of the oxide La{sub 1.6}Sr{sub 0.4}NiO{sub 4.10} at 670 K under hydrogen. This strongly reduced nickelate - 65% Ni{sup +I} - is stable in air, at room temperature. The crystallographic characterization points to an orthorhombic unit cell: a = 3.8729(6) {angstrom}, b = 3.7242(6) {angstrom}, c = 12.767(2) {angstrom}. Structure calculations evidence an oxygen-deficient K{sub 2}NiF{sub 4}-type structure. The oxygen vacancies are found only in the NiO{sub 2} equatorial planes, leading to a lowering of the nickel coordination. The main feature is the occurrence of Ni-O squares systematically orientated along the c-axis.

Authors:

Crespin, M; Bassat, J M; Odier, P ^[1]; Mouron, P; Choisnet, J ^[2]

CNRS, Orleans (France)
Universite d'Orleans (France)

Publication Date:: Mon Jan 01 00:00:00 EST 1990

OSTI Identifier:: 6883608

Resource Type:: Journal Article

Journal Name:: Journal of Solid State Chemistry; (USA)

Additional Journal Information:: Journal Volume: 84:1; Journal ID: ISSN 0022-4596

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; LANTHANUM OXIDES; CRYSTAL STRUCTURE; SYNTHESIS; NICKEL OXIDES; STRONTIUM OXIDES; DATA ANALYSIS; EXPERIMENTAL DATA; MEASURING INSTRUMENTS; MEASURING METHODS; ORTHORHOMBIC LATTICES; SUPERCONDUCTIVITY; ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; CRYSTAL LATTICES; DATA; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; INFORMATION; LANTHANUM COMPOUNDS; NICKEL COMPOUNDS; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; STRONTIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; 360201* - Ceramics, Cermets, & Refractories- Preparation & Fabrication; 360202 - Ceramics, Cermets, & Refractories- Structure & Phase Studies

Citation Formats


                    Crespin, M, Bassat, J M, Odier, P, Mouron, P, and Choisnet, J. Synthesis and crystallographic characterization of the mixed-valence reduced nickelate La sub 1. 6 Sr sub 0. 4 (Ni sup +I ,Ni sup +II )O sub 3. 47.  United States: N. p., 1990. 
        Web.  doi:10.1016/0022-4596(90)90195-4.

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                    Crespin, M, Bassat, J M, Odier, P, Mouron, P, & Choisnet, J. Synthesis and crystallographic characterization of the mixed-valence reduced nickelate La sub 1. 6 Sr sub 0. 4 (Ni sup +I ,Ni sup +II )O sub 3. 47.  United States.  https://doi.org/10.1016/0022-4596(90)90195-4

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                    Crespin, M, Bassat, J M, Odier, P, Mouron, P, and Choisnet, J. 1990.  
        "Synthesis and crystallographic characterization of the mixed-valence reduced nickelate La sub 1. 6 Sr sub 0. 4 (Ni sup +I ,Ni sup +II )O sub 3. 47".  United States.  https://doi.org/10.1016/0022-4596(90)90195-4.

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@article{osti_6883608,

  title        = {Synthesis and crystallographic characterization of the mixed-valence reduced nickelate La sub 1. 6 Sr sub 0. 4 (Ni sup +I ,Ni sup +II )O sub 3. 47},

  author       = {Crespin, M and Bassat, J M and Odier, P and Mouron, P and Choisnet, J},

  abstractNote = {The new mixed-valence nickelate La{sub 1.6}Sr{sub 0.4}(Ni{sup +I}, Ni{sup +II})O{sub 3.47} was prepared by low-temperature reduction of the oxide La{sub 1.6}Sr{sub 0.4}NiO{sub 4.10} at 670 K under hydrogen. This strongly reduced nickelate - 65% Ni{sup +I} - is stable in air, at room temperature. The crystallographic characterization points to an orthorhombic unit cell: a = 3.8729(6) {angstrom}, b = 3.7242(6) {angstrom}, c = 12.767(2) {angstrom}. Structure calculations evidence an oxygen-deficient K{sub 2}NiF{sub 4}-type structure. The oxygen vacancies are found only in the NiO{sub 2} equatorial planes, leading to a lowering of the nickel coordination. The main feature is the occurrence of Ni-O squares systematically orientated along the c-axis.},

  doi          = {10.1016/0022-4596(90)90195-4},

  url          = {https://www.osti.gov/biblio/6883608},
  journal      = {Journal of Solid State Chemistry; (USA)},

  issn         = {0022-4596},

  number       = ,

  volume       = 84:1,

  place        = {United States},

  year         = {Mon Jan 01 00:00:00 EST 1990},

  month        = {Mon Jan 01 00:00:00 EST 1990}

}

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