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

Authors
Case, GS Hector, AL Levason, W Needs, RL Thomas, MF Weller, MT
Citation
Gs. Case et al., Syntheses, powder neutron diffraction structures and Mossbauer studies of some complex iron oxyfluorides: Sr3Fe2O6F0.87, Sr2FeO3F and Ba2InFeO5F0.68, J MAT CHEM, 9(11), 1999, pp. 2821-2827
Citations number
36
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF MATERIALS CHEMISTRY
ISSN journal
09599428 → ACNP
Volume
9
Issue
11
Year of publication
1999
Pages
2821 - 2827
Database
ISI
SICI code
0959-9428(1999)9:11<2821:SPNDSA>2.0.ZU;2-D
Abstract
Sr2FeO3F and the novel phases Sr3Fe2O6F0.87 and Ba2InFeO5F0.68 have been pr epared and their structures investigated by powder neutron diffraction meth ods. Sr2FeO3F crystallises with the T* modification of the K2NiF4 structure owing to oxide/fluoride ordering. Sr3Fe2O6F0.87 and Ba2InFeO5F0.68 are mix ed valent phases prepared by reaction of anion deficient iron(III) material s with gaseous fluorine. Sr3Fe2O6F0.87 is a Ruddlesden-Popper type material which has been shown by Mossbauer spectroscopy to contain iron(III) and ir on(V). Ba2InFeO5F0.68 is the first example of an iron oxyfluoride with a pe rovskite-type structure.