METHOD FOR DETERMINING THE CONCENTRATION OF MANGANITES OF RARE EARTH ELEMENTS

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FIELD : chemistry. SUBSTANCE : method of determining the concentration of lanthanum manganite powder synthesized in the mixture system of La(1-x)SrxMnO3, obtained by mixing the starting components in the form of powdersLa2O3, MnCO3 andSrCO3 and subsequent synthesis comprises determining a powder of lanthanum manganite reflectance in the visible region of the spectrum at a wavelength of 546 nm. The concentration of lanthanum manganite corresponding to a certain value of the reflection coefficient in the visible region of the spectrum at a wavelength of 546 nm, determined by the calibration curve previously constructed for the various powders synthesized lanthanum manganite system La(1-x)SrxMnO3 According to X-ray diffraction analysis, determining the concentration of lanthanum manganite, and the reflectance values in the visible spectrum at a wavelength of 546 nm. EFFECT : determining the concentration of lanthanum manganite for the powders obtained in different conditions. 4 dwg, 1 tbl, 7 ex