Materials Data on Tl(Cu3S2)2 by Materials Project

Abstract

TlCu6S4 is alpha bismuth trifluoride-derived structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Cu+1.17+ sites. In the first Cu+1.17+ site, Cu+1.17+ is bonded to four equivalent S2- atoms to form a mixture of corner and edge-sharing CuS4 tetrahedra. All Cu–S bond lengths are 2.38 Å. In the second Cu+1.17+ site, Cu+1.17+ is bonded to four S2- atoms to form a mixture of corner and edge-sharing CuS4 tetrahedra. There are two shorter (2.28 Å) and two longer (2.51 Å) Cu–S bond lengths. Tl1+ is bonded in a body-centered cubic geometry to eight equivalent S2- atoms. All Tl–S bond lengths are 3.39 Å. There are two inequivalent S2- sites. In the first S2- site, S2- is bonded in a 4-coordinate geometry to four equivalent Cu+1.17+ and four equivalent Tl1+ atoms. In the second S2- site, S2- is bonded in a body-centered cubic geometry to eight Cu+1.17+ atoms.