Acta Cryst. (2007). E63, i188  [ doi:10.1107/S1600536807050568 ]

Evidence of a centre of symmetry: redetermination of Ni_2.60Te₂ from single-crystal data

L. D. Gulay, M. Daszkiewicz and A. Pietraszko

Abstract: The crystal structure of the title compound, nickel telluride, with composition Ni_2.60Te₂, has been the subject of a previous investigation based on X-ray powder data, when a slightly different composition of Ni_2.58Te₂ was determined [Gulay & Olekseyuk (2004). J. Alloys Compd, 376, 131-138]. In contrast to the previous refinement in the space group Pmc2₁, 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 × (3a)^1/2 distorted orthorhombic variant of the hexagonal Ni_1.10Se_0.16Te_0.74 structure. All atoms are situated on mirror planes.

Online 19 October 2007

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