Materials Data on Cs2Si(S2O7)3 by Materials Project
Cs2Si(S2O7)3 crystallizes in the trigonal P-3 space group. The structure is three-dimensional. there are two inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Cs–O bond distances ranging from 3.14–3.69 Å. In the second Cs1+ site, Cs1+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Cs–O bond distances ranging from 3.21–3.57 Å. There are three inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to six O2- atoms to form SiO6 octahedra that share corners with six SO4 tetrahedra. There is three shorter (1.78 Å) and three longer (1.79 Å) Si–O bond length. In the second Si4+ site, Si4+ is bonded to six O2- atoms to form SiO6 octahedra that share corners with six SO4 tetrahedra. All Si–O bond lengths are 1.79 Å. In the third Si4+ site, Si4+ is bonded to six O2- atoms to form SiO6 octahedra that share corners with six SO4 tetrahedra. All Si–O bond lengths are 1.79 Å. There are six inequivalent S6+ sites. In the first S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share a cornercorner with one SiO6 octahedra and a cornercorner with one SO4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There are a spread of S–O bond distances ranging from 1.43–1.67 Å. In the second S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share a cornercorner with one SiO6 octahedra and a cornercorner with one SO4 tetrahedra. The corner-sharing octahedral tilt angles are 41°. There are a spread of S–O bond distances ranging from 1.43–1.66 Å. In the third S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share a cornercorner with one SiO6 octahedra and a cornercorner with one SO4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There are a spread of S–O bond distances ranging from 1.43–1.66 Å. In the fourth S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share a cornercorner with one SiO6 octahedra and a cornercorner with one SO4 tetrahedra. The corner-sharing octahedral tilt angles are 40°. There are a spread of S–O bond distances ranging from 1.43–1.66 Å. In the fifth S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share a cornercorner with one SiO6 octahedra and a cornercorner with one SO4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There are a spread of S–O bond distances ranging from 1.43–1.66 Å. In the sixth S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share a cornercorner with one SiO6 octahedra and a cornercorner with one SO4 tetrahedra. The corner-sharing octahedral tilt angles are 42°. There are a spread of S–O bond distances ranging from 1.43–1.66 Å. There are twenty-one inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one Cs1+ and one S6+ atom. In the second O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Si4+ and one S6+ atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to one Si4+ and one S6+ atom. In the fourth O2- site, O2- is bonded in a single-bond geometry to two equivalent Cs1+ and one S6+ atom. In the fifth O2- site, O2- is bonded in a single-bond geometry to one Cs1+ and one S6+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Cs1+ and two S6+ atoms. In the seventh O2- site, O2- is bonded in a single-bond geometry to one Cs1+ and one S6+ atom. In the eighth O2- site, O2- is bonded in a single-bond geometry to one Cs1+ and one S6+ atom. In the ninth O2- site, O2- is bonded in a single-bond geometry to one Cs1+ and one S6+ atom. In the tenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Si4+ and one S6+ atom. In the eleventh O2- site, O2- is bonded in a single-bond geometry to one Cs1+ and one S6+ atom. In the twelfth O2- site, O2- is bonded in a bent 150 degrees geometry to one Si4+ and one S6+ atom. In the thirteenth O2- site, O2- is bonded in a single-bond geometry to two equivalent Cs1+ and one S6+ atom. In the fourteenth O2- site, O2- is bonded in a bent 120 degrees geometry to one Cs1+ and two S6+ atoms. In the fifteenth O2- site, O2- is bonded in a bent 120 degrees geometry to one Cs1+ and two S6+ atoms. In the sixteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Si4+ and one S6+ atom. In the seventeenth O2- site, O2- is bonded in a single-bond geometry to one Cs1+ and one S6+ atom. In the eighteenth O2- site, O2- is bonded in a bent 150 degrees geometry to one Si4+ and one S6+ atom. In the nineteenth O2- site, O2- is bonded in a single-bond geometry to one Cs1+ and one S6+ atom. In the twentieth O2- site, O2- is bonded in a single-bond geometry to two equivalent Cs1+ and one S6+ atom. In the twenty-first O2- site, O2- is bonded in a single-bond geometry to two Cs1+ and one S6+ atom.