The crystal structure of the low-temperature form of Ag5Te2Cl

Crystals of trimorphic Ag5Te2Cl were obtained by solid state reaction from a stoichiometric mixture of silver, tellurium, and tellurium(IV)chloride (4 80 degrees C, 4-10 days). The crystals were cooled down to -80 degrees C wi thout decomposition and data collection was carried out at this temperature . The low temperature form of the title compound crystallizes in space grou p P2(1)/c with lattice constants of a = 19.359(1) Angstrom, b = 7.713(1) An gstrom, c = 19.533(1) Angstrom, beta = 90.6 degrees(1), V = 2916.4(1), and Z = 16. The refinement converged to residual values of R-1 = 0.0381 and wR( 2) = 0.0847, respectively. Te and Cl atoms form empty, distorted octahedra interconnected by common vertices to give a 3D-network. Ag atoms form clust ers with Ag-Ag distances between 2.83 Angstrom and 3.10 Angstrom.