Abstract
dc:description.abstractAlkali metal halide layers were constructed within Dion-Jacobson (DJ) layered perovskites by a two-step sequential intercalation method. Reductive intercalation with an alkali metal, followed by oxidative intercalation with chlorine gas, leads to the formation of compounds of the general formula, (A2Cl)LaNb2O7 (A = Rb, Cs). Rietveld refinement of X-ray powder diffraction data shows that an alkali metal halide layer is formed between the perovskite blocks. The alkali metal cation is eight-coordinate with 4 oxygens from the perovskite layer and 4 chlorides from the new halide layer; this environment is similar to cesium in the CsCl structure. Thermal analysis indicates that these are low-temperature phases where decomposition begins below 200°C. Details on the synthesis and characterization of this set of compounds are presented and the general utility of this approach discussed.
Degree
thesis:*- Name thesis:degree_name
- M.S.
- Level thesis:degree_level
- Thesis
- Discipline thesis:degree_discipline
- Chemistry
- Year
- 2006
Author and committee
dc:creator, dc:contributor.*- Author dc:creator
-
- Zhang, Xiao
- Contributors dc:contributor
-
- Wiley, John
- Stevens, Edwin
- Tarr, Matthew
Identifiers
dc:identifier.*- Repository record dc:identifier
- https://scholarworks.uno.edu/td/415
- OAI identifier oai:identifier
- oai:scholarworks.uno.edu:td-1436