R.H. Zhang
La2SrCr2O7F2: A Ruddlesden–Popper Oxyfluoride Containing Octahedrally Coordinated Cr4+ Centers
Zhang, R.H.; Read, G.; Lang, F.; Lancaster, T.; Blundell, S.J.; Hayward, M.A.
Authors
G. Read
F. Lang
Professor Tom Lancaster tom.lancaster@durham.ac.uk
Professor
S.J. Blundell
M.A. Hayward
Abstract
The low-temperature fluorination of the n = 2 Ruddlesden–Popper phase La2SrCr2O7 yields La2SrCr2O7F2 via a topochemical fluorine insertion reaction. The structure-conserving nature of the fluorination reaction means that the chromium centers of the initial oxide phase retain an octahedral coordination environment in the fluorinated product, resulting in a material containing an extended array of apex-linked Cr4+O6 units. Typically materials containing networks of octahedrally coordinated Cr4+ centers can only be prepared at high pressure; thus, the preparation of La2SrCr2O7F2 demonstrates that low-temperature topochemical reactions offer an alternative synthesis route to materials of this type. Neutron diffraction, magnetization, and μ+SR data indicate that La2SrCr2O7F2 undergoes a transition to an antiferromagnetic state below TN ≈ 140 K. The structure–property relations of this phase and other Cr4+ oxide phases are discussed.
Citation
Zhang, R., Read, G., Lang, F., Lancaster, T., Blundell, S., & Hayward, M. (2016). La2SrCr2O7F2: A Ruddlesden–Popper Oxyfluoride Containing Octahedrally Coordinated Cr4+ Centers. Inorganic Chemistry, 55(6), 3169-3174. https://doi.org/10.1021/acs.inorgchem.6b00114
Journal Article Type | Article |
---|---|
Acceptance Date | Mar 21, 2016 |
Online Publication Date | Mar 9, 2016 |
Publication Date | Mar 21, 2016 |
Deposit Date | Oct 18, 2016 |
Publicly Available Date | May 25, 2018 |
Journal | Inorganic Chemistry |
Print ISSN | 0020-1669 |
Electronic ISSN | 1520-510X |
Publisher | American Chemical Society |
Peer Reviewed | Peer Reviewed |
Volume | 55 |
Issue | 6 |
Pages | 3169-3174 |
DOI | https://doi.org/10.1021/acs.inorgchem.6b00114 |
Public URL | https://durham-repository.worktribe.com/output/1395243 |
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Copyright Statement
ACS AuthorChoice - This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
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