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X-ray diffraction and Mössbauer spectrometry studies of molecular iron compounds
Costa, B. F. O.; Greneche, J. M.; Silva, M. Ramos; Pereira, L. C. J.We have synthesized two new iron complexes that have been structural and magnetically characterized: diphenylguanidinium hexafluoroferrate and hexakisvaline-oxo-triiron(III) chloride. The former crystallizes as monomers with the fluoride ions six-coordinating the Fe(II) ion. Valine iron chloride is comprised of trinuclear complexes, with a well ordered oxo-centered carboxylate core and some disordered organic l...
Structural analysis and 57Fe Mössbauer spectrometry of Zr6FeSn2 and related com...
Costa, B. F. O.; Greneche, J. M.; Fruchart, D.; Alberto, H. V.; Skryabina, N. E.; Romaka, L. P.; Stadnyk, Yu. V.Hexagonal compounds of formula Zr6FeX2 were prepared and studied by X-ray and neutron diffraction and by 57Fe Mössbauer spectroscopy. The first results indicate that most of the compounds can be prepared mainly as a single phase after at least 5 weeks of annealing at a temperature close to 900 °C. In particular, the hyperfine parameter distributions in Mössbauer spectra reflect the ability to form pure phases. ...
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