Ruddlesden-Popper Phases A<sub>n+1</sub>M<sub>n</sub>O<sub>3n+1</sub>: Structures and Properties
TL;DRAbstract
Intergrowth crystal structures in inorganic systems have provided a fertile field of solid state chemical research for many years and the discovery of high-T<sub>c</sub> superconducting cuprates has focused attention on intergrowth structures based on perovskite blocks. Ruddlesden and Popper (R-P hereafter) have described intergrowth structures with the general formula Sr<sub>n+1</sub>Ti<sub>n</sub>O<sub>3n+1</sub> where n is the number of perovskite layers separated by SrO layers. Indeed, La<sub>2</sub>CuO<sub>4</sub> corresponds to the n = 1 phase in which the decreased ionic charge of the octahedral ion is compensated by the increased ionic charge of the dodecahedral ion.
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Intergrowth crystal structures in inorganic systems have provided a fertile field of solid state chemical research for many years and the discovery of high-T<sub>c</sub> superconducting cuprates has focused attention on intergrowth structures based on perovskite blocks. Ruddlesden and Popper (R-P hereafter) have described intergrowth structures with the general formula Sr<sub>n+1</sub>Ti<sub>n</sub>O<sub>3n+1</sub> where n is the number of perovskite layers separated by SrO layers. Indeed, La<sub>2</sub>CuO<sub>4</sub> corresponds to the n = 1 phase in which the decreased ionic charge of the octahedral ion is compensated by the increased ionic charge of the dodecahedral ion.
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