Structural Chemistry of an n = 1 Member of the Ruddlesden–Popper Srn+1(Co0.5Ta0.5)nO3n+1 Homologous Series: Sr4CoTaO8

✍ Scribed by Khalid Boulahya; Marina Parras; José María González-Calbet

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 158 KB
• Volume: 2007
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/ejic.200700047

✦ Synopsis

Abstract

A layered perovskite related compound with the Sr~4~CoTaO~8~ composition was isolated. This material constitutes the n = 1 member of the recently reported [Sr~n+1~(Co~0.5~Ta~0.5~)__~n~O~3__n+1~] Ruddlesden–Popper series. XRPD, SAED and HREM reveal that this compound crystallizes as a K~2~NiF~4~‐type with space group __I__4/mmm. The structure is formed by one Sr~2~CoTaO~6~ perovskite block that intergrows with one SrO rock salt layer; no ordering between the Co and Ta cations was established. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)