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Issue 11, 1999
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Syntheses, powder neutron diffraction structures and Mössbauer studies of some complex iron oxyfluorides: Sr3Fe2O6F0.87, Sr2FeO3F and Ba2InFeO5F0.68

G. Simon Case,  Andrew L. Hector,  William Levason,  Richard L. Needs,  Michael F. Thomas  and  Mark T. Weller 

Abstract

Sr2FeO3F and the novel phases Sr3Fe2O6F0.87 and Ba2InFeO5F0.68 have been prepared and their structures investigated by powder neutron diffraction methods. Sr2FeO3F crystallises with the T* modification of the K2NiF4 structure owing to oxide/fluoride ordering. Sr3Fe2O6F0.87 and Ba2InFeO5F0.68 are mixed valent phases prepared by reaction of anion deficient iron(III) materials with gaseous fluorine. Sr3Fe2O6F0.87 is a Ruddlesden–Popper type material which has been shown by Mössbauer spectroscopy to contain iron(III) and iron(V). Ba2InFeO5F0.68 is the first example of an iron oxyfluoride with a perovskite-type structure.

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Article type: Paper
DOI: 10.1039/A905730G
Citation: J. Mater. Chem., 1999,9, 2821-2827
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    Syntheses, powder neutron diffraction structures and Mössbauer studies of some complex iron oxyfluorides: Sr3Fe2O6F0.87, Sr2FeO3F and Ba2InFeO5F0.68

    G. Simon Case, A. L. Hector, W. Levason, R. L. Needs, M. F. Thomas and M. T. Weller, J. Mater. Chem., 1999, 9, 2821
    DOI: 10.1039/A905730G

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