TlxTi6Se8 and TlxNb6Se8, two phases with filled up Nb3Te4 type of structure showing pronounced cation disorder |
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Authors: | H Boller K Klepp |
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Affiliation: | Institut für Physikalische Chemie der Universität Wien Währingerstrasse 42, A-1090 Wien, Austria;Institut für Anorganische Chemie der Technischen Hochschule Aachen, Prof.Pirlet-Strasse 1, D-5100 Aachen, BRD |
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Abstract: | The new ternary chalcogenides TlxTi6Se8 (x= 0.76) and TlxNb6Se8 (x= 0.70) crystallize with a partially filled up Nb3Te4-structure: space group , z= 1 with The crystal structures were determined from single crystal diffractometer data and refined to a conventional R-value of 0.077 and 0.055 respectively. The T1 atoms in the octahedral channels cannot be localized. In TlxTi6Se8 diffuse scattering indicates one-dimensional short range order. A model of the cation distribution in Tl0.76Ti6Se8 is discussed. |
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