Location of metallic elements in (Co1−xFex)2(OH)2(C8H4O4): use of MAD, neutron diffraction and 57Fe Mössbauer spectroscopy
2010; Royal Society of Chemistry; Volume: 12; Issue: 10 Linguagem: Inglês
10.1039/b926144c
ISSN1466-8033
AutoresAdel Mesbah, B. Malaman, Thomas Mazet, Romain Sibille, Michel François,
Tópico(s)Crystal Structures and Properties
ResumoFour samples of the solid solution (Co1−xFex)2(OH)2(C8H4O4) x = 0.25 (1), x = 0.5 (2), x = 0.75 (3); x = 0.88 (4) (C2/m) were investigated by synchrotron radiation using Multi-wavelength Anomalous Diffraction (MAD) and multipattern refinements in order to locate the two neighbour metallic elements Fe and Co. Although there is no cation ordering, the two metallic sites M1 (0, 0, 0) and M2 (0, 0.5, 0.5) are preferentially occupied by Co and Fe respectively. In this article we demonstrate that this distribution is in agreement with neutron data and 57Fe Mössbauer spectra at 100 K. Consequently, the MAD method can be used to locate close d-metallic elements in metal–organic frameworks.
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