Water-containing derivative phases of the Sr{sub n+1}Fe{sub n}O{sub 3n+1} series
- Materials and Structures Laboratory, Tokyo Institute of Technology, Yokohama 226-8503 (Japan)
The n=1, 2, 3 and {infinity} members of the homologous series Sr{sub n+1}Fe{sub n}O{sub 3n+1} of layered iron oxides are investigated for their tendency to accept additional layers of water in their crystals. The phases possess a Ruddlesden-Popper-type SrO-(SrO-FeO{sub 2}){sub n} crystal structure, where the n={infinity} limit is nothing but the perovskite structure. It is revealed that the n=1, 2 and 3 phases readily accommodate one or two layers of water between adjacent SrO layers, whereas the n={infinity} member which lacks the SrO-SrO double-layer unit remains intact in the presence of water. The speed of the water intercalation process is found to decrease with increasing n. Among the layered water derivatives, the n=2 phase with two water molecules per formula unit, i.e. Sr{sub 3}Fe{sub 2}O{sub 7}.2H{sub 2}O, was found to be most stable. - Graphical abstract: Water-containing derivative phases obtained from the homologous series of Sr{sub n+1}Fe{sub n}O{sub 3n+1} Ruddlesden-Popper phases through topotactic water intercalation.
- OSTI ID:
- 21043749
- Journal Information:
- Journal of Solid State Chemistry, Vol. 180, Issue 11; Other Information: DOI: 10.1016/j.jssc.2007.09.020; PII: S0022-4596(07)00393-3; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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