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Crystal structure and Mössbauer studies of the isotypic Fe6-cluster compounds RE15[Fe8C25], RE=Dy, Ho

MPG-Autoren
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Davaasuren,  Bambar
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Dashjav,  Enkhtsetseg
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Kreiner,  Guido
Guido Kreiner, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Borrmann,  Horst
Horst Borrmann, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Kniep,  Rüdiger
Rüdiger Kniep, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Zitation

Davaasuren, B., Dashjav, E., Kreiner, G., Borrmann, H., Weber, S.-U., Becker, K.-D., et al. (2015). Crystal structure and Mössbauer studies of the isotypic Fe6-cluster compounds RE15[Fe8C25], RE=Dy, Ho. Journal of Solid State Chemistry, 225(0), 450-454. doi:10.1016/j.jssc.2015.01.019.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-0026-B63C-8
Zusammenfassung
Abstract The carboferrates RE15[Fe8C25] (RE=Dy, Ho) were prepared from mixtures of the elements by arc-melting followed with subsequent annealing at 1373xa0;K. The crystal structures were determined from single crystal X-ray diffraction data and revealed an isotypic relationship to Er15[Fe8C25] (hP48, P321). The main feature of the crystal structure is given by Fe6 cluster units characterized by covalent Fe–Fe bonding interactions. 57Fe Mössbauer spectra of Dy15[Fe8C25] were fitted by three subspectra with relative spectral weights of about 3:3:2 which is in general agreement with the crystal structure. Below 50xa0;K, an onset of magnetic hyperfine fields at the three iron sites is observed which is supposed to be caused by dipolar fields arising from neighboring, slowly relaxing Dy magnetic moments.