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Rietveld refinement of nanostructural LaMnO3+δ perovskite-type manganite

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6 Author(s)
Batdemberel, G. ; Sch. of Mater. Sceince, Mongolian Univ. of Sci. & Technol., Ulaanbaatar, Mongolia ; Bulgan, G. ; Dinnebier, R.E. ; Munkhbaatar, P.
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The nanostructural LaMnO3+δ perovskite manganite investigated by x-ray diffraction (XRD). Our sample have been synthesized by the amorphous heteronuclear complexing method at 800°C temperature. X-ray diffraction analysis using Rietveld refinement show that our sample is single phase and crystallize in the rhombohedral distorted perovskite structure with R3̅c space group and with lattice parameters of a = b = 0.550 and c =1.334nm. It was established considerable distortion of oxygen atom in the rhombohedral structure from own initial positions 4b. Our results indicate that oxygen excess parameter for LaMnO3+δ is 0.29. We determined the crystallite size 39 - 47 nm of LaMnO3+δ using Scherrer equation from x-ray diffraction pattern.

Published in:

Strategic Technology (IFOST), 2010 International Forum on

Date of Conference:

13-15 Oct. 2010