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Title

Structural Features of B-site Substituted Nano-Lanthanum Manganite

Year: 1397
COI: IRANCC20_133
Language: EnglishView: 188
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Authors

Elham Ghiasi, - Department of Chemistry, Faculty of Chemistry, Damghan University, Damghan, I. R. Iran
Azim Malekzadeh - Department of Chemistry, Faculty of Chemistry, Damghan University, Damghan, I. R. Iran

Abstract:

In this study, LaMn(1-x)FexO3 nanoparticles with x = 0, 0.5, and 1 were synthesized via citrate method [1]. Samples were studied by thermal gravimetric/ differential (TG/DTA) analysis, infrared spectroscopy, X-ray powder diffraction (XRD) and SEM characterizations. The structural characterization using commercial Xpert package and Fullprof program are witness for a structural phase transition in manganese replacement with iron. The structural analysis shows a rhombohedral toward cubic phase transition upon replacing of Mn by Fe in the form of LaMn(1-x)FexO3. The influence of Fe substitution on the crystal structure can be described by a tolerance factor [t=ra+rO/√2(rB+rO)] for estimation of deviation from the ideal structure. As a result, in Fe-substituted sample, t increases and rhombohedral structure transforms toward cubic structure, having higher symmetry [2]. Compared to the manganese, a more affinity is observed for the lanthanum toward iron for the cubic perovskite phase formation of LaBO3 (B: Mn or Fe) [3].

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This Paper COI Code is IRANCC20_133. Also You can use the following address to link to this article. This link is permanent and is used as an article registration confirmation in the Civilica reference:

https://civilica.com/doc/850769/

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Ghiasi,, Elham and Malekzadeh, Azim,1397,Structural Features of B-site Substituted Nano-Lanthanum Manganite,20th Iranian Chemical Congress,Davarzan,https://civilica.com/doc/850769

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Type of center: دانشگاه دولتی
Paper count: 1,604
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