XAFS investigations of tin nitrides.
Tin nitrides (Sn3N4) prepared by the reaction of Sn-halides with KNH2 in liquid ammonia and a subsequent vacuum annealing procedure were investigated with transmission mode XAFS experiments. While the near edge data suggest the presence of a univalent Sn-compound with a valency close to +4, the analysis of the extended X-ray absorption fine structure proves the presence of two different local Sn sites in this crystal structure: While Sn(1) is surrounded by 4 nitrogen in a distance of 2.06 A, each Sn(2) ion is coordinated with 6 nitrogen at about 2.17 A radial distance.
Lützenkirchen-Hecht
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Institut für Materialwissenschaften und FB 8 Physik, Bergische Universität Gesamthochschule Wuppertal, Germany. dirklh@uni-wuppertal.de
Scotti
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Jacobs
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Frahm
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