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Artículo

Study of Kβ X-ray emission spectroscopy applied to Mn(2−x)V(1+x)O4 (x=0 and 1/3) oxyspinel and comparison with XANES

Ceppi, Sergio AndresIcon ; Mesquita, A.; Pomiro, FernandoIcon ; Pannunzio Miner, Elisa VictoriaIcon ; Tirao, German AlfredoIcon
Fecha de publicación: 01/2014
Editorial: Pergamon-Elsevier Science Ltd.
Revista: Journal of Physics and Chemistry of Solids
ISSN: 0022-3697
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Astronomía

Resumen

Oxidation state and coordination of transition metal cations seems to be hard to assess when considering multiple cations, each one with different possible oxidation states. In fact, this is the case of the spinel-type double oxides family. High resolution Kβ X-ray fluorescence spectra were measured in Mn(2−x)V(1+x)O4 (x=0 and 13) spinels-type double oxides in order to determine the oxidation state and coordination of V and Mn cations. The relative intensity of radiative Auger effect KM2,3M4,5 to the total intensity and the integral absolute difference value were used as reference parameters for the characterization of Mn oxidation states. The coordination of Mn ions was inferred by the intensity of the Kβ5 line. In the case of V compounds, it was used as the intensity of the line Kβ′ relative to the total area of Kβ region. The obtained results were further compared with X-ray absorption spectra analysis, showing good agreements regarding the oxidation state characterization. However, there were found some discrepancies in coordination, due to customary oversimplifications in the Kβ5 line origin. The obtained results might represent valuable and useful data for chemical scopes of characterizing spinel-type oxides family.
Palabras clave: Oxides , Xafs
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/31380
DOI: http://dx.doi.org/10.1016/j.jpcs.2013.11.002
URL: http://www.sciencedirect.com/science/article/pii/S0022369713003715
Colecciones
Articulos(IFEG)
Articulos de INST.DE FISICA ENRIQUE GAVIOLA
Articulos(INFIQC)
Articulos de INST.DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Citación
Tirao, German Alfredo; Pannunzio Miner, Elisa Victoria; Pomiro, Fernando; Mesquita, A.; Ceppi, Sergio Andres; Study of Kβ X-ray emission spectroscopy applied to Mn(2−x)V(1+x)O4 (x=0 and 1/3) oxyspinel and comparison with XANES; Pergamon-Elsevier Science Ltd.; Journal of Physics and Chemistry of Solids; 75; 3; 1-2014; 366-373
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