Materials Data on Cs3Ag2Sb3S8 by Materials Project
Cs3Ag2Sb3S8 crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. there are three inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded in a 9-coordinate geometry to nine S2- atoms. There are a spread of Cs–S bond distances ranging from 3.64–4.15 Å. In the second Cs1+ site, Cs1+ is bonded in a 9-coordinate geometry to nine S2- atoms. There are a spread of Cs–S bond distances ranging from 3.52–3.90 Å. In the third Cs1+ site, Cs1+ is bonded in a 7-coordinate geometry to seven S2- atoms. There are a spread of Cs–S bond distances ranging from 3.72–3.91 Å. Ag1+ is bonded to four S2- atoms to form distorted AgS4 tetrahedra that share a cornercorner with one SbS4 tetrahedra, corners with three equivalent AgS4 tetrahedra, and edges with two equivalent AgS4 tetrahedra. There are a spread of Ag–S bond distances ranging from 2.52–2.85 Å. There are three inequivalent Sb+3.67+ sites. In the first Sb+3.67+ site, Sb+3.67+ is bonded in a 3-coordinate geometry to three S2- atoms. There are one shorter (2.52 Å) and two longer (2.54 Å) Sb–S bond lengths. In the second Sb+3.67+ site, Sb+3.67+ is bonded in a distorted T-shaped geometry to three S2- atoms. There are one shorter (2.42 Å) and two longer (2.53 Å) Sb–S bond lengths. In the third Sb+3.67+ site, Sb+3.67+ is bonded to four S2- atoms to form SbS4 tetrahedra that share corners with two equivalent AgS4 tetrahedra. There are a spread of Sb–S bond distances ranging from 2.35–2.38 Å. There are six inequivalent S2- sites. In the first S2- site, S2- is bonded in a 6-coordinate geometry to one Cs1+, four equivalent Ag1+, and one Sb+3.67+ atom. In the second S2- site, S2- is bonded in a 2-coordinate geometry to four Cs1+ and two Sb+3.67+ atoms. In the third S2- site, S2- is bonded in a 7-coordinate geometry to four Cs1+, two equivalent Ag1+, and one Sb+3.67+ atom. In the fourth S2- site, S2- is bonded in a 2-coordinate geometry to two Cs1+, one Ag1+, and one Sb+3.67+ atom. In the fifth S2- site, S2- is bonded to four Cs1+ and one Sb+3.67+ atom to form a mixture of distorted corner and edge-sharing SCs4Sb square pyramids. In the sixth S2- site, S2- is bonded to four Cs1+ and one Sb+3.67+ atom to form a mixture of distorted corner and edge-sharing SCs4Sb square pyramids.