Transforming n=1 members of the Ruddlesden-Popper phases to a n=3 member through metathesis: synthesis of a new layered perovskite, Ca<SUB>2</SUB>La<SUB>2</SUB>CuTi<SUB>2</SUB>O<SUB>10</SUB>
- Sivakumar, T.
- Lofland, S. E.
- Ramanujachary, K. V.
- Ramesha, K.
- Subbanna, G. N.
- Gopalakrishnan, J.
DOIAbstract
We report the formation of a new n=3 Ruddlesden-Popper (R-P) layered perovskite oxide, Ca2La2CuTi2O10 (I), in the metathesis reaction between NaLaTiO4 and Ca2CuO2Cl2 (n=1 R-P phases) at 700°C in air. Rietveld refinement of powder XRD data shows that I is isostructural with Sr4Ti3O10 (space group I4/mmm; a=3.8837(5), c=27.727(6) Å), consisting of triple perovskite CuTi2O10 sheets wherein Cu and Ti are ordered at the central and terminal octahedral sites, respectively. Magnetization data provide support for the presence of strong antiferromagnetically coupled CuO2 sheets in the structure. I is metastable decomposing at higher temperatures (~950°C) to a mixture of perovskite-like CaLa2CuTi2O9 and CaO. Interestingly, the reaction...
Add to ORKG