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- W2006660074 abstract "The oxygen-deficient system SrMn{sub 1-x}Co{sub x}O{sub 3-y} (0 {le} {times} {le} 1) has been studied by X-ray and neutron powder diffraction, magnetic susceptibility, {sup 57}Fe Moessbauer spectroscopy, and EXAFS techniques. Three new phases have been obtained, the most significant being an incommensurate phase for 0.40 {le} {times} {le} 0.55 which is believed to be closely related to the family of perovskite structures with hexagonal symmetry. However, the EXAFS data show the existence of some as yet unidentified structural features which are not found in perovskites, for example a Co-Co distance of {approx} 2.8 {Angstrom}. The Mn cations occupy an environment which is significantly different from that of the Co cations. At high cobalt content (x {approx} 0.8) and high temperatures the system adopts a pseudocubic perovskite structure, with corner-shared polyhedra, which transforms on slow cooling to a poorly defined hexagonal phase containing face- and edge-shared polyhedra, similar to H-Sr{sub 2}Co{sub 2}O{sub 5+z}. There is evidence to suggest that these hexagonal phases may also be incommensurate." @default.
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- W2006660074 date "1989-08-01" @default.
- W2006660074 modified "2023-09-26" @default.
- W2006660074 title "A study of a new incommensurate phase in the system SrMn1−xCoxO3−y" @default.
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- W2006660074 doi "https://doi.org/10.1016/0022-4596(89)90009-1" @default.
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