BaLn2Se4 (Ln = Er, Tm and Yb).
Identifieur interne : 000519 ( PubMed/Corpus ); précédent : 000518; suivant : 000520BaLn2Se4 (Ln = Er, Tm and Yb).
Auteurs : Daniel E. Bugaris ; James A. IbersSource :
- Acta crystallographica. Section C, Crystal structure communications [ 1600-5759 ] ; 2009.
Abstract
The compounds BaLn(2)Se(4) (Ln = rare-earth metal = lanthanide = Er, Tm and Yb), namely barium di(erbium/thulium/ytterbium) tetraselenide, crystallize in the orthorhombic space group Pnma in the CaFe(2)O(4) structure type. In this structure type, all atoms possess m symmetry. The Ln atoms are octahedrally coordinated by six Se atoms. A three-dimensional channel structure is formed by the corner- and edge-sharing of these LnSe(6) octahedra. 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.
DOI: 10.1107/S0108270109030571
PubMed: 19726843
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pubmed:19726843Le document en format XML
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<front><div type="abstract" xml:lang="en">The compounds BaLn(2)Se(4) (Ln = rare-earth metal = lanthanide = Er, Tm and Yb), namely barium di(erbium/thulium/ytterbium) tetraselenide, crystallize in the orthorhombic space group Pnma in the CaFe(2)O(4) structure type. In this structure type, all atoms possess m symmetry. The Ln atoms are octahedrally coordinated by six Se atoms. A three-dimensional channel structure is formed by the corner- and edge-sharing of these LnSe(6) octahedra. 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.</div>
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<Abstract><AbstractText>The compounds BaLn(2)Se(4) (Ln = rare-earth metal = lanthanide = Er, Tm and Yb), namely barium di(erbium/thulium/ytterbium) tetraselenide, crystallize in the orthorhombic space group Pnma in the CaFe(2)O(4) structure type. In this structure type, all atoms possess m symmetry. The Ln atoms are octahedrally coordinated by six Se atoms. A three-dimensional channel structure is formed by the corner- and edge-sharing of these LnSe(6) octahedra. 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.</AbstractText>
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