METHOD FOR DETERMINING THE CONCENTRATION OF MANGANITES OF RARE EARTH ELEMENTS Russian patent published in 2017 - IPC C01F11/00 C01F5/00 C01F17/00 G01N33/00 

FIELD: chemistry.

SUBSTANCE: method of determining the concentration of lanthanum manganite powder synthesized in the mixture system of La_(1-x)Sr_xMnO_3, obtained by mixing the starting components in the form of powders La₂O₃, MnCO₃ and SrCO₃ 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)Sr_xMnO₃ 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