Synthesis and Crystal Structure of Sr2ScBiO6

✍ Scribed by P.E. Kazin; A.M. Abakumov; D.D. Zaytsev; Yu.D. Tretyakov; N.R. Khasanova; G. Van Tendeloo; M. Jansen

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 456 KB
• Volume: 162
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.2001.9375

✦ Synopsis

A new complex oxide Sr 2 ScBiO 6 was synthesized by a solid state reaction in air. The compound is stable up to 11503C and acquires the desired oxygen stoichiometry at 8503C. The crystal structure was determined using powder X-ray di4raction, electron di4raction, and high-resolution electron microscopy. Sr 2 ScBiO 6 has a perovskite-derived pseudocubic face-centered unit cell (a ‫؍‬ 8.1816(3) A s ) and a rock-salt ordering of Sc 3؉ and Bi 5؉ over the B positions. Electron microscopy investigation reveals that the real structure is of the La 2 NiRuO 6 type, monoclinic with cell parameters a+b ‫؍‬ a per (2+5.785 A s , c ‫؍‬ 2a per +8.182 A s , and P2 1 /n space group. The structure can be described by an a ؉ b ؊ b ؊ system of the BO 6 octahedral tilting. The presence of numerous twin domains is a characteristic feature of this compound.