Synthesis and Structure Determination of La8Ti10S24O4

✍ Scribed by L Cario; C Deudon; A Meerschaut; J Rouxel

• Book ID: 102974801
• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 714 KB
• Volume: 136
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1997.7649

✦ Synopsis

The new compound La 8 Ti 10 S 24 O 4 has been prepared from a mixture of La 2 Ti 2 O 7 and La 2 O 3 (in a 5:1 ratio) heated at 1200°°C under a H 2 S gas flow. This new quaternary phase was obtained due to an incomplete sulfidizing process. Single-crystal X-ray diffraction studies show that La 8 Ti 10 S 24 O 4 crystallizes in space group P4/mmm, with Z" "1, in a cell of dimensions a" " b" "10.421 A s and c" "8.384 A s . Least-squares refinement converged to values of R" "0.045 and R w " "0.048. The structure can be viewed as a stacking of two types of layers along the cl axis. These layers are built up from infinite rutile-like chains (Ti octahedra) that cross perpendicularly. La atoms, in a tricapped prismatic coordination, are located in tunnels that develop parallel to the cl direction.