TaNi2.05Te3, eine Verbindung mit “aufgefüllter” TaFe1+xTe3‐Struktur

TaNi2.05Te3, a Novel Telluride with “Stuffed” TaFe1+xTe3 Structure The novel metal‐rich layer compound TaNi2.05Te3 was synthesized from the elements. Its structure contains TaNi2Te3 layers which are interconnected by Ni atoms on partially occupied tetragonal‐pyramidal sites located between the layers. The title compound and the related telluride TaFe1.14Te3 form a pair of compounds differing only in the occupation or nonoccupation of one 3d‐material atom site. Therefore, the structure of TaNi2.05Te3, which is stabilized by interstial Ni atoms, can be regarded as a “stuffed” TaFe1.14Te3 type. Pairs of compounds with a similar structural relationship seem to be of general importance in early transition‐metal chalcogenide chemistry. The existence of TaNi2.05Te3 was recently proposed based on the results of extended Hückel band‐structure calculations. TaNi2.05Te3 is a metallic conductor according to the results of four‐probe resistivity measurements.