Abstract
Single crystals of the title compound, octaiodide decaantimonate hexatriacontagermanide, were grown by chemical transport reactions. The structure is isotypic with the analogous clathrates-I. In this structure, the (Ge,Sb)46 framework consists of statistically occupied Ge and Sb sites that atoms form bonds in a distorted tetrahedral arrangement. They form polyhedra that are covalently bonded to each other by shared faces. There are two polyhedra of different sizes, viz. a (Ge,Sb)20 dodecahedron and a (Ge,Sb)24 tetracosahedron in a 1:3 ratio. The guest atom (iodine) resides inside these polyhedra with symmetry m3 (Wyckoff position 2a) and 2m (Wyckoff position 2d), respectively.
Highlights
Single crystals of the title compound, octaiodide decaantimonate hexatriacontagermanide, were grown by chemical transport reactions
The (Ge,Sb)46 framework consists of statistically occupied Ge and Sb sites that atoms form bonds in a distorted tetrahedral arrangement
L’histoire et les developpements recents des composes type clathrate du silicium et des elements de la colonne 14 ont eterelates par Cros & Pouchard (2009)
Summary
Key indicators: single-crystal X-ray study; T = 150 K; mean (I–Ge) = 0.0004 A; disorder in main residue; R factor = 0.037; wR factor = 0.091; data-to-parameter ratio = 55.7. Single crystals of the title compound, octaiodide decaantimonate hexatriacontagermanide, were grown by chemical transport reactions. The structure is isotypic with the analogous clathrates-I. In this structure, the (Ge,Sb) framework consists of statistically occupied Ge and Sb sites that atoms form bonds in a distorted tetrahedral arrangement. The (Ge,Sb) framework consists of statistically occupied Ge and Sb sites that atoms form bonds in a distorted tetrahedral arrangement They form polyhedra that are covalently bonded to each other by shared faces. A (Ge,Sb) dodecahedron and a (Ge,Sb) tetracosahedron in a 1:3 ratio. The guest atom (iodine) resides inside these polyhedra with symmetry m3 (Wyckoff position 2a) and 42m (Wyckoff position 2d), respectively
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