SYNTHESIS AND RIETVELD CRYSTAL STRUCTURE REFINEMENT OF Tl5Te2Br

Abstract

Tl5Te2Br ternary compound have been prepared from proper amounts of preliminary synthesized Tl2Te and TlBr. It wa crystallized using specially designed method by authors - from two immiscible  liquid phases L1+L2. The crystal structure refinement was done using powder X-ray diffraction data measured on conventional diffractometer “D8 ADVANCE” with CuKα- radiation and in the 2θ range of 5-130o. The Rietveld refinement program used in this study was the TOPAS-4.2 version of Bruker Company. The structure has been refined in the tetragonal space group, I4/mcm, and its’ cell parameters were determined: a = 8.974(1), c = 12.812(3)Å, V = 1031.8(4) Å3. It was found to be isostructural with Tl5Se2Br.