The Crystal Structure of Sr2TiSi2O8

✍ Scribed by Thomas Höche; Wolfgang Neumann; Saeid Esmaeilzadeh; Reinhard Uecker; Markus Lentzen; Christian Rüssel

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 625 KB
• Volume: 166
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.2002.9545

✦ Synopsis

Sr 2 TiSi 2 O 8 single crystals were grown by Czochralski pulling and from a high-temperature solution. X-ray di4ractometry revealed the modulated crystal structure of Sr 2 TiSi 2 O 8 to belong to the 5D superspace group P4bm (؊ , , 1/2; , , 1/2) with ‫؍‬ 0.3. Atomic positions, anisotropic displacement factors and positional modulation parameters for Sr 2 TiSi 2 O 8 are determined and discussed. The positional modulation is further investigated by electron di4raction and high-resolution transmission electron microscopy. In the latter experiments, the 2D modulation appears to be superimposed by some 1D modulation waves. This e4ect is discussed in terms of growth conditions.

2002 Elsevier Science (USA)