This research was considered to study various properties of the Lanthana mixed with beech wood flour (BWF), as a new structure. For this purpose, La2O3 powders in the BWF have been obtained by sol-gel method using simultaneous gelation of all cations. La2O3 - BW samples are analysed by X-ray diffraction .The obtained results showed the formation of nano crystalline La2O3 phases. The average crystallite size is calculated by using X-ray diffraction analysis. It indicates that the difference in La2O3 behavior in the complex wood matrix may be due to chemical and physical interactions between La2O3 and lignins in the wood, or the presence of considerable amounts of inorganic cations in the sample.

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