Details
| Original language | English |
|---|---|
| Pages (from-to) | 51-71 |
| Number of pages | 21 |
| Journal | Chimica Techno Acta |
| Volume | 6 |
| Issue number | 2 |
| Early online date | 5 Aug 2019 |
| Publication status | E-pub ahead of print - 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.
Keywords
- Complex oxides, Crystal structure, LaNiO, Mössbauer spectroscopy, Patterson analysis, Rietveld refinement, Ruddlesden-Popper phases
ASJC Scopus subject areas
- Chemical Engineering(all)
- General Chemical Engineering
- Chemistry(all)
- General Chemistry
- Materials Science(all)
- Materials Chemistry
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In: Chimica Techno Acta, Vol. 6, No. 2, 05.08.2019, p. 51-71.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
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
Y1 - 2019/8/5
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
UR - http://www.scopus.com/inward/record.url?scp=85095713915&partnerID=8YFLogxK
U2 - 10.15826/chimtech.2019.6.2.03
DO - 10.15826/chimtech.2019.6.2.03
M3 - Article
AN - SCOPUS:85095713915
VL - 6
SP - 51
EP - 71
JO - Chimica Techno Acta
JF - Chimica Techno Acta
SN - 2409-5613
IS - 2
ER -