Materials Data on TlCu7S4 by Materials Project
TlCu7S4 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are seven inequivalent Cu1+ sites. In the first Cu1+ site, Cu1+ is bonded in a trigonal planar geometry to three S2- atoms. There are a spread of Cu–S bond distances ranging from 2.26–2.38 Å. In the second Cu1+ site, Cu1+ is bonded in a trigonal planar geometry to three S2- atoms. There are a spread of Cu–S bond distances ranging from 2.32–2.37 Å. In the third Cu1+ site, Cu1+ is bonded in a trigonal non-coplanar geometry to three S2- atoms. There are a spread of Cu–S bond distances ranging from 2.29–2.36 Å. In the fourth Cu1+ site, Cu1+ is bonded in a distorted trigonal non-coplanar geometry to three S2- atoms. There are a spread of Cu–S bond distances ranging from 2.34–2.43 Å. In the fifth Cu1+ site, Cu1+ is bonded in a 2-coordinate geometry to four S2- atoms. There are a spread of Cu–S bond distances ranging from 2.21–2.90 Å. In the sixth Cu1+ site, Cu1+ is bonded in a 3-coordinate geometry to four S2- atoms. There are a spread of Cu–S bond distances ranging from 2.25–2.92 Å. In the seventh Cu1+ site, Cu1+ is bonded in a 3-coordinate geometry to four S2- atoms. There are a spread of Cu–S bond distances ranging from 2.30–2.93 Å. Tl1+ is bonded in a body-centered cubic geometry to eight S2- atoms. There are a spread of Tl–S bond distances ranging from 3.25–3.46 Å. There are four inequivalent S2- sites. In the first S2- site, S2- is bonded in a 5-coordinate geometry to six Cu1+ and two equivalent Tl1+ atoms. In the second S2- site, S2- is bonded in a 7-coordinate geometry to five Cu1+ and two equivalent Tl1+ atoms. In the third S2- site, S2- is bonded in a 5-coordinate geometry to six Cu1+ and two equivalent Tl1+ atoms. In the fourth S2- site, S2- is bonded in a 5-coordinate geometry to seven Cu1+ and two equivalent Tl1+ atoms.