The crystal structure of hexathallium(I) hexatellurodigermanate(III), Tl6[Ge2Te6] |
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Authors: | G Eulenberger |
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Institution: | Institut für Chemie, Universität Hohenheim, Garbenstrasse 30, D-7000 Stuttgart 70, Federal Republic of Germany |
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Abstract: | The new compound Tl6Ge2Te6] was prepared by thermal synthesis from the elements. The material is triclinic, space group , with a = 9.471(2), b = 9.714(2), c = 10.389(2) Å, α = 89.39(1), β = 97.27(1), γ = 100.79(1)°, and Z = 2. The crystal structure was determined from single-crystal intensity data measured by means of an automated four-circle diffractometer and refined to an R value of 0.053 for 1831 observed reflections. Tl6Ge2Te6] is characterized by Ge2Te6 units with GeGe bonds which are linked into a three-dimensional structure by Tl atoms coordinated to essentially six Te atoms. The most important mean distances are Å, Å, and Å. The lone 6s electron pairs of the thallium(I) atoms exhibit significant stereochemical activity. Tl6Ge2Te6] represents a new structure type. |
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