NaTe3: eine Verbindung mit verbrückten Te126−-Clustern

NaTe₃ – a Compound with Cuban-like Clusters Te₁₂^6? NaTe₃ results as a greyish microcrystalline powder if stoichiometric amounts of the pure elements sodium and tellurium (molar ratio 1:3) are allowed to react in liquid ammonia at about ?50°C. After melting the crude product (500°C, 1 h, corundum crucible in sealed glass ampoule), followed by an annealing period (380°C, 5 days) NaTe₃ yields as a silvery compound with metallic lustre. NaTe₃ is trigonal, space group P3 c1, Z = 12, with a = 9.033(2) Å and c = 21.930(4) Å. It contains Te₆^2?-chains, linked together via their terminal atoms producing infinite strings. These strings may be thought to be built up of cuban-like clusters Te₁₂^6?.