Construction of a double-layered tetrahedral network within a perovskite host: Two-step route to the alkali-metal-halide layered perovskite (Li {sub x} Cl)LaNb{sub 2}O{sub 7}
- Department of Chemistry and the Advanced Materials Research Institute, University of New Orleans, LA 70148-2820 (United States)
A two-step topotactic route is used to construct lithium halide layers within a perovskite host. Initially RbLaNb{sub 2}O{sub 7} is converted to (CuCl)LaNb{sub 2}O{sub 7} by ion exchange and then reductive intercalation with n-butyllithium is used to form (Li {sub x} Cl)LaNb{sub 2}O{sub 7}. The copper metal byproduct from the reduction step is removed by treatment with iodine. Rietveld refinement of neutron powder diffraction data revealed that an alkali-halide double layer with LiO{sub 2}Cl{sub 2} tetrahedra forms between the perovskite slabs. Compositional studies indicate that the range for x in (Li {sub x} Cl)LaNb{sub 2}O{sub 7} is 2{<=}x<4, which appears consistent with the neutron data where only one lithium site was found in the structure. - Graphical abstract: Alkali-halide layers can be constructed within a layered perovskite host via a two-step topochemical process.
- OSTI ID:
- 21015687
- Journal Information:
- Journal of Solid State Chemistry, Vol. 180, Issue 2; Other Information: DOI: 10.1016/j.jssc.2006.11.014; PII: S0022-4596(06)00594-9; Copyright (c) 2006 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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