Materials Data on K4MnH6(S2O9)2 by Materials Project
K4MnH6(S2O9)2 crystallizes in the orthorhombic Pccn space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of K–O bond distances ranging from 2.78–3.14 Å. In the second K1+ site, K1+ is bonded in a 7-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.76–3.30 Å. Mn2+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with four equivalent SO4 tetrahedra. There are a spread of Mn–O bond distances ranging from 2.17–2.22 Å. There are three inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the second H1+ site, H1+ is bonded in a linear geometry to two O2- atoms. There is one shorter (1.03 Å) and one longer (1.55 Å) H–O bond length. In the third H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. There are two inequivalent S6+ sites. In the first S6+ site, S6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of S–O bond distances ranging from 1.46–1.61 Å. In the second S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share corners with two equivalent MnO6 octahedra. The corner-sharing octahedra tilt angles range from 42–46°. There is two shorter (1.49 Å) and two longer (1.50 Å) S–O bond length. There are nine inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent K1+ and one S6+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two K1+, one Mn2+, and one S6+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to two K1+ and one S6+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to two K1+ and one S6+ atom. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to two K1+, one Mn2+, and one S6+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two equivalent K1+, one H1+, and one S6+ atom. In the seventh O2- site, O2- is bonded in a distorted water-like geometry to one K1+, one Mn2+, and two H1+ atoms. In the eighth O2- site, O2- is bonded in a 2-coordinate geometry to two K1+, one H1+, and one S6+ atom. In the ninth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent K1+ and one S6+ atom.