DOI: 10.17188/1288236
title: Materials Data on K2FeH4(SO5)2 by Materials Project

description: K2FeH4(SO5)2 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are four inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 11-coordinate geometry to three H1+ and eight O2- atoms. There are a spread of K–H bond distances ranging from 2.83–2.97 Å. There are a spread of K–O bond distances ranging from 2.70–3.08 Å. In the second K1+ site, K1+ is bonded in a 8-coordinate geometry to one H1+ and seven O2- atoms. The K–H bond length is 2.86 Å. There are a spread of K–O bond distances ranging from 2.61–3.03 Å. In the third K1+ site, K1+ is bonded in a 11-coordinate geometry to two H1+ and nine O2- atoms. There are one shorter (2.96 Å) and one longer (2.97 Å) K–H bond lengths. There are a spread of K–O bond distances ranging from 2.85–3.31 Å. In the fourth K1+ site, K1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of K–O bond distances ranging from 2.67–2.96 Å. There are two inequivalent Fe2+ sites. In the first Fe2+ site, Fe2+ is bonded to six O2- atoms to form distorted FeO6 octahedra that share corners with three SO4 tetrahedra. There are a spread of Fe–O bond distances ranging from 1.86–2.39 Å. In the second Fe2+ site, Fe2+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with three SO4 tetrahedra. There are a spread of Fe–O bond distances ranging from 2.10–2.30 Å. There are eight inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a distorted single-bond geometry to one K1+ and one O2- atom. The H–O bond length is 1.00 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the third H1+ site, H1+ is bonded in a single-bond geometry to two K1+ and one O2- atom. The H–O bond length is 0.98 Å. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one K1+ and one O2- atom. The H–O bond length is 0.98 Å. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one K1+ and one O2- atom. The H–O bond length is 1.00 Å. In the sixth H1+ site, H1+ is bonded in a distorted single-bond geometry to two O2- atoms. There is one shorter (1.01 Å) and one longer (1.63 Å) H–O bond length. In the seventh H1+ site, H1+ is bonded in a distorted single-bond geometry to one K1+ and two O2- atoms. There is one shorter (1.01 Å) and one longer (1.62 Å) H–O bond length. In the eighth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. There are four inequivalent S6+ sites. In the first S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share corners with two FeO6 octahedra. The corner-sharing octahedra tilt angles range from 42–46°. There are a spread of S–O bond distances ranging from 1.47–1.51 Å. In the second S6+ site, S6+ is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There are a spread of S–O bond distances ranging from 1.47–1.50 Å. In the third S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share corners with two FeO6 octahedra. The corner-sharing octahedral tilt angles are 43°. There is two shorter (1.49 Å) and two longer (1.50 Å) S–O bond length. In the fourth S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share corners with two FeO6 octahedra. The corner-sharing octahedra tilt angles range from 41–47°. There are a spread of S–O bond distances ranging from 1.48–1.52 Å. There are twenty inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to two K1+, one Fe2+, 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 distorted single-bond geometry to two K1+ and one S6+ atom. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to two K1+, one Fe2+, and one S6+ atom. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to two K1+, one Fe2+, and one H1+ atom. In the sixth O2- site, O2- is bonded in a distorted single-bond geometry to two K1+ 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. In the eighth O2- site, O2- is bonded in a 3-coordinate geometry to one K1+, one Fe2+, and one S6+ atom. In the ninth O2- site, O2- is bonded in a distorted water-like geometry to one K1+, one Fe2+, and two H1+ atoms. In the tenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Fe2+ and one H1+ atom. In the eleventh O2- site, O2- is bonded in a distorted single-bond geometry to two K1+, one Fe2+, and one S6+ atom. In the twelfth O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one H1+, and one S6+ atom. In the thirteenth O2- site, O2- is bonded in a 1-coordinate geometry to two K1+ and one S6+ atom. In the fourteenth O2- site, O2- is bonded in a 1-coordinate geometry to two K1+, one Fe2+, and one S6+ atom. In the fifteenth O2- site, O2- is bonded in a 1-coordinate geometry to two K1+, one Fe2+, and one S6+ atom. In the sixteenth O2- site, O2- is bonded in a 2-coordinate geometry to two K1+, one H1+, and one S6+ atom. In the seventeenth O2- site, O2- is bonded in a single-bond geometry to two K1+ and one S6+ atom. In the eighteenth O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Fe2+, and one S6+ atom. In the nineteenth O2- site, O2- is bonded in a distorted water-like geometry to one K1+, one Fe2+, and two H1+ atoms. In the twentieth O2- site, O2- is bonded in a distorted water-like geometry to one Fe2+ and two H1+ atoms.