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Structural Chemistry of a New 10H Hexagonal Perovskite: BaMn 0.4 Fe 0.6 O 2.73
Author(s) -
Miranda Laura,
RamírezCastellanos Julio,
Hernando María,
Varela Aurea,
GonzálezCalbet José M.,
Parras Marina
Publication year - 2007
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200601173
Subject(s) - chemistry , octahedron , crystallography , electron diffraction , hexagonal crystal system , perovskite (structure) , tetrahedron , diffraction , crystal chemistry , phase (matter) , x ray crystallography , crystal structure , physics , organic chemistry , optics
A new 10H polytype has been stabilized in the BaMn 1– x Fe x O 3– y system with the composition BaMn 0.4 Fe 0.6 O 2.73 . The anionic composition has been established by a reduction and re‐oxidation cycle in the stability range of this phase. The structural characterization was carried out by high‐resolution electron microscopy (HREM), electron diffraction, and X‐ray diffraction. The structure is closely related to the ideal (hch′ch) 2 10H polytype with two oxygen‐deficient hexagonal (h′) BaO 2– y layers per unit formula. This framework gives rise to blocks of three octahedra sharing faces linked by corners to two corner‐sharing tetrahedra.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)