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. 2009 Feb 18;65(Pt 3):i15.
doi: 10.1107/S1600536809004991.

I(8)As(21)Ge(25)

Katia Ayouz  1 , Mohammed Kars, Allaoua Rebbah, Houria Rebbah
Affiliations

I(8)As(21)Ge(25)

Katia Ayouz et al. Acta Crystallogr Sect E Struct Rep Online. .

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.

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Figures

Fig. 1.
Fig. 1.
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.
See this image and copyright information in PMC

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