Materials Data on K2Ge(S2O7)3 by Materials Project

Abstract

K2Ge(S2O7)3 crystallizes in the trigonal P-3 space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.94–3.12 Å. In the second K1+ site, K1+ is bonded in a 6-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.85–3.34 Å. Ge4+ is bonded to six O2- atoms to form GeO6 octahedra that share corners with six SO4 tetrahedra. All Ge–O bond lengths are 1.91 Å. There are two 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 GeO6 octahedra and a cornercorner with one SO4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. There are a spread of S–O bond distances ranging from 1.43–1.66 Å. In the second S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share a cornercorner with one GeO6 octahedra and a cornercorner with one SO4 tetrahedra. The corner-sharing octahedral tilt angles are 49°. There are a spread of S–O bond distances ranging from 1.43–1.66 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one K1+ and one S6+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one K1+ and one S6+ atom. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to one K1+ and two S6+ atoms. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to one Ge4+ and one S6+ atom. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to one K1+ and one S6+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Ge4+ and one S6+ atom. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to two K1+ and one S6+ atom.