Synthesis of mixed-valent [alpha]- and [beta]-NaFe[subscript 2]O[subscript 3] polymorphs under controlled partial oxygen pressure
- MSU
Synthesis of mixed valent compounds, especially when multiple polymorphs exist, requires careful control of the preparation conditions. {alpha}- and {beta}-NaFe{sub 2}O{sub 3} polymorphs were synthesized under controlled partial oxygen pressure (pO{sub 2}). pO{sub 2} regions of stability at 850 C were determined for both phases for the first time. A modified oxygen buffer method was developed for the facile preparation of mixed valent oxides under controlled pO{sub 2}. {beta}-NaFe{sub 2}O{sub 3} is the only known n = 2 member of the AM{sub n}O{sub n+1} (A = alkali metal, M = 3d metal) rock-salt related homolog series with layered cation ordering. The possibility of new members of the homolog series with other 3d metals is considered.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Sponsoring Organization:
- UNIVERSITY
- OSTI ID:
- 1048558
- Journal Information:
- J. Solid State Chem., Vol. 192, Issue 08, 2012; ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- ENGLISH
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