doi: 10.1107/S1600536809004991.
I(8)As(21)Ge(25)
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- PMID:21582033
- PMCID: PMC2968696
- DOI: 10.1107/S1600536809004991
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I(8)As(21)Ge(25)
Katia Ayouz et al. Acta Crystallogr Sect E Struct Rep Online..
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Abstract
Single crystals of octaiodine henacosarsenic pentacosagermanium were grown by chemical transport reactions. The structure is isotypic with the analogous clathrates-I. In this structure, the statistically occupied clathrand atoms (As,Ge)(46) form bonds in a distorted tetra-hedral coordination and their arrangement can define two polyhedra of different sizes; one is an (As,Ge)(20) penta-gonal dodeca-hedron, and the other is an (As,Ge)(24) tetra-kaideca-hedron. The guest atom (iodine) resides inside these polyhedra with site symmetry m3 (Wyckoff position 2a) and 2m (Wyckoff position 6d), respectively.
Figures
Projection de la structure de I8As21Ge25 sur le plan (100) montrant les atomes d'Iode (en rouge); d'Arsenic (en bleu) et de Germanium (en gris), avec un déplacement des ellipsoīdes à 90% de probabilité.
References
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