Evidence of a centre of symmetry: redetermination of Ni2.60Te2 from single-crystal data

The crystal structure of the title compound, nickel telluride, with composition Ni 2.60 Te 2 , has been the subject of a previous investigation based on X-ray powder data, when a slightly different composition of Ni 2.58 Te 2 was determined [Gulay & Olekseyuk (2004). J. Alloys Compd , 376 , 131–138]. In contrast to the previous refinement in the space group Pmc 2 1 , the redetermination from single-crystal data reveals a centre of symmetry and the structure was refined in the space group Pnma with improved precision for the atomic coordinates and interatomic distances. The structure can be described as a c × a × (3 a ) 1/2 distorted orthorhombic variant of the hexagonal Ni 1.10 Se 0.16 Te 0.74 structure. All atoms are situated on mirror planes.