Investigations into the structure of La3Ni2-xFexO7±δ

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Autoren

  • E. A. Kiselev
  • P. Gaczynski
  • G. Eckold
  • Armin Feldhoff
  • K. D. Becker
  • V. A. Cherepanov

Externe Organisationen

  • Ural Federal University (UrFU)
  • Technische Universität Braunschweig
  • Georg-August-Universität Göttingen
Forschungs-netzwerk anzeigen

Details

OriginalspracheEnglisch
Seiten (von - bis)51-71
Seitenumfang21
FachzeitschriftChimica Techno Acta
Jahrgang6
Ausgabenummer2
Frühes Online-Datum5 Aug. 2019
PublikationsstatusElektronisch veröffentlicht (E-Pub) - 5 Aug. 2019

Abstract

The room-temperature (RT) 57Fe Mössbauer spectra of the La3Ni2-xFexO7±δoxide solid solutions of Ruddlesden-Popper-type (x = 0.05, 0.10) reveal two doublets for Fe3+ions in octahedral coordination by oxygen. The existence of two inequivalent sites for Fe at RT is at variance with the space groups Fmmm and Cmcm (Amam) which have been reported for La3Ni2O7±δ. This unexpected finding is discussed in connection with Patterson analyses and Rietveld refinements of powder XRD data for x = 0, 0.05, and 0.10. Alternative structural models have been proposed which can explain the spectroscopic findings and which are compatible with the results from X-ray diffraction.

ASJC Scopus Sachgebiete

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Investigations into the structure of La3Ni2-xFexO7±δ. / Kiselev, E. A.; Gaczynski, P.; Eckold, G. et al.
in: Chimica Techno Acta, Jahrgang 6, Nr. 2, 05.08.2019, S. 51-71.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Kiselev, EA, Gaczynski, P, Eckold, G, Feldhoff, A, Becker, KD & Cherepanov, VA 2019, 'Investigations into the structure of La3Ni2-xFexO7±δ', Chimica Techno Acta, Jg. 6, Nr. 2, S. 51-71. https://doi.org/10.15826/chimtech.2019.6.2.03
Kiselev, E. A., Gaczynski, P., Eckold, G., Feldhoff, A., Becker, K. D., & Cherepanov, V. A. (2019). Investigations into the structure of La3Ni2-xFexO7±δ. Chimica Techno Acta, 6(2), 51-71. Vorabveröffentlichung online. https://doi.org/10.15826/chimtech.2019.6.2.03
Kiselev EA, Gaczynski P, Eckold G, Feldhoff A, Becker KD, Cherepanov VA. Investigations into the structure of La3Ni2-xFexO7±δ. Chimica Techno Acta. 2019 Aug 5;6(2):51-71. Epub 2019 Aug 5. doi: 10.15826/chimtech.2019.6.2.03
Kiselev, E. A. ; Gaczynski, P. ; Eckold, G. et al. / Investigations into the structure of La3Ni2-xFexO7±δ. in: Chimica Techno Acta. 2019 ; Jahrgang 6, Nr. 2. S. 51-71.
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abstract = "The room-temperature (RT) 57Fe M{\"o}ssbauer spectra of the La3Ni2-xFexO7±δoxide solid solutions of Ruddlesden-Popper-type (x = 0.05, 0.10) reveal two doublets for Fe3+ions in octahedral coordination by oxygen. The existence of two inequivalent sites for Fe at RT is at variance with the space groups Fmmm and Cmcm (Amam) which have been reported for La3Ni2O7±δ. This unexpected finding is discussed in connection with Patterson analyses and Rietveld refinements of powder XRD data for x = 0, 0.05, and 0.10. Alternative structural models have been proposed which can explain the spectroscopic findings and which are compatible with the results from X-ray diffraction.",
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T1 - Investigations into the structure of La3Ni2-xFexO7±δ

AU - Kiselev, E. A.

AU - Gaczynski, P.

AU - Eckold, G.

AU - Feldhoff, Armin

AU - Becker, K. D.

AU - Cherepanov, V. A.

N1 - Funding Information: K.-D.B. and P.G. would like to thank the Volkswagen-Foundation and the State of Lower Saxony (Germany) for financial support of the present work. E.K. and V.C. acknowledge support of their work by the Ministry of Education and Science of the Russian Federation. A.F. is grateful to the Deutsche Forschungsgemeinschaft (DFG) for financial support in the frame of grant FE928/7–1. Thanks are also due to Prof. TGh.esing (U Bremen, Germany) for chemical EDX analyses of samples. E.K and VC. h. work was supported by Act 211 Government of the Russian Federation, agreement 02.A03.21.0006.

PY - 2019/8/5

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N2 - The room-temperature (RT) 57Fe Mössbauer spectra of the La3Ni2-xFexO7±δoxide solid solutions of Ruddlesden-Popper-type (x = 0.05, 0.10) reveal two doublets for Fe3+ions in octahedral coordination by oxygen. The existence of two inequivalent sites for Fe at RT is at variance with the space groups Fmmm and Cmcm (Amam) which have been reported for La3Ni2O7±δ. This unexpected finding is discussed in connection with Patterson analyses and Rietveld refinements of powder XRD data for x = 0, 0.05, and 0.10. Alternative structural models have been proposed which can explain the spectroscopic findings and which are compatible with the results from X-ray diffraction.

AB - The room-temperature (RT) 57Fe Mössbauer spectra of the La3Ni2-xFexO7±δoxide solid solutions of Ruddlesden-Popper-type (x = 0.05, 0.10) reveal two doublets for Fe3+ions in octahedral coordination by oxygen. The existence of two inequivalent sites for Fe at RT is at variance with the space groups Fmmm and Cmcm (Amam) which have been reported for La3Ni2O7±δ. This unexpected finding is discussed in connection with Patterson analyses and Rietveld refinements of powder XRD data for x = 0, 0.05, and 0.10. Alternative structural models have been proposed which can explain the spectroscopic findings and which are compatible with the results from X-ray diffraction.

KW - Complex oxides

KW - Crystal structure

KW - LaNiO

KW - Mössbauer spectroscopy

KW - Patterson analysis

KW - Rietveld refinement

KW - Ruddlesden-Popper phases

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