Determination of cations distribution in Mn3O4 by anomalous x-ray powder diffraction

Autor:	Tim Graber, Dale E. Wittmer, S. M. Mini, Fujio Izumi, Yanan Xiao, P. James Viccaro
Rok vydání:	2004
Předmět:	Crystallography Materials science Physics and Astronomy (miscellaneous) Anomalous scattering Absorption edge Rietveld refinement X-ray crystallography Spinel Neutron diffraction engineering Crystal structure engineering.material Powder diffraction
Zdroj:	Applied Physics Letters. 85:736-738
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.1776326
Popis:	The oxidation states of Mn at two different crystallographic sites in the distorted spinel structure of Mn3O4 were determined by the approach of anomalous synchrotron x-ray powder diffraction. The real parts of anomalous scattering factors for the two Mn sites were refined from a series of powder diffraction patterns collected at the vicinity of K absorption edge of Mn. The results of Rietveld refinements showed that the two distinct cation sites can obviously be distinguished from each other and that Mn2+ ions occupy the tetrahedral site and Mn3+ ions are located at the octahedral site.
Databáze:	OpenAIRE
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