期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 11, 期 2, 页码 527-532出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b008321f
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The structures of Sr2FeO3F, Sr2FeO3Cl and Sr2FeO3Br have been investigated using powder neutron diffraction (PND). All three ferrates crystallise in the primitive tetragonal space group P4/nmm and the anions are fully ordered giving iron oxygen square pyramids separated by rock salt type layers of strontium halide. Fe-57 Mossbauer data have been collected and confirm one iron(iii) site of distorted octahedral geometry in all three structures. Variable temperature PND data have been used to determine the root 2a x 2c magnetic superstructure of Sr2FeO3F.
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