The compounds BaLn 2Se4 (Ln = rare-earth metal = lanthanide = Er, Tm and Yb), namely barium di(erbium/thulium/ytterbium) tetra-selenide, crystallize in the ortho-rhom-bic space group Pnma in the CaFe2O4 structure type. In this structure type, all atoms possess m symmetry. The Ln atoms are octa-hedrally coordinated by six Se atoms. A three-dimensional channel structure is formed by the corner- and edge-sharing of these LnSe6 octa-hedra. The Ba atoms are coordinated to eight Se atoms in a bicapped trigonal-prismatic arrangement, and they occupy the channels of the three-dimensional framework.
|Original language||English (US)|
|Journal||Acta Crystallographica Section C: Crystal Structure Communications|
|State||Published - Aug 22 2009|
ASJC Scopus subject areas
- Biochemistry, Genetics and Molecular Biology(all)