Extracting chemical information from high-resolution Kβ X-ray emission spectroscopy

LIMANDRI, S.; LIMANDRI, S.; TIRAO, G.; ROBLEDO J. I.; TIRAO, G.; ROBLEDO J. I.

SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY

PERGAMON-ELSEVIER SCIENCE LTD

Año: 2018 vol. 144 p. 29 - 37

0584-8547

High-resolution X-ray emission spectroscopy allows studying the chemical environment of a wide variety of materials. Chemical information can be obtained by fitting the X-ray spectra and observing the behavior of some spectral features. Spectral changes can also be quantified by means of statistical parameters calculated by considering the spectrum as a probability distribution. Another possibility is to perform statistical multivariate analysis, such as principal component analysis. In this work the performance of these procedures for extracting chemical information in X-ray emission spectroscopy spectra for mixtures of Mn2+ and Mn4+ oxides are studied. A detail analysis of the parameters obtained, as well as the associated uncertainties is shown. The methodologies are also applied for Mn oxidation state characterization of double perovskite oxides Ba1+xLa1−xMnSbO6 (with 0 ¡Ü x ¡Ü 0.7). The results show that statistical parameters and multivariate analysis are the most suitable for the analysis of this kind of spectra.