DOI: 10.17188/1717539
title: Materials Data on Fe3H28(S2O15)2 by Materials Project

description: Fe(H2O)6(FeH8(SO6)2)2 crystallizes in the triclinic P-1 space group. The structure is two-dimensional and consists of one iron hexahydrate molecule and one FeH8(SO6)2 sheet oriented in the (0, 0, 1) direction. In the FeH8(SO6)2 sheet, Fe+2.67+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with two SO4 tetrahedra. There are a spread of Fe–O bond distances ranging from 1.96–2.09 Å. There are eight inequivalent H1+ sites. In the first 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 (1.68 Å) H–O bond length. In the second 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 (1.65 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 1.00 Å. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the fifth 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 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 (1.65 Å) H–O bond length. In the seventh H1+ site, H1+ is bonded in a single-bond geometry to two O2- atoms. There is one shorter (1.00 Å) and one longer (1.72 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 0.99 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 FeO6 octahedra. The corner-sharing octahedral tilt angles are 34°. There are a spread of S–O bond distances ranging from 1.47–1.52 Å. In the second S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share a cornercorner with one FeO6 octahedra. The corner-sharing octahedral tilt angles are 32°. There are a spread of S–O bond distances ranging from 1.48–1.51 Å. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Fe+2.67+ and one S6+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one H1+ and one S6+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to one S6+ atom. In the fourth O2- site, O2- is bonded in a single-bond geometry to one S6+ atom. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to one Fe+2.67+ and one S6+ atom. In the sixth O2- site, O2- is bonded in a single-bond geometry to one S6+ atom. In the seventh O2- site, O2- is bonded in a distorted trigonal planar geometry to two H1+ and one S6+ atom. In the eighth O2- site, O2- is bonded in a 3-coordinate geometry to one H1+ and one S6+ atom. In the ninth O2- site, O2- is bonded in a distorted water-like geometry to one Fe+2.67+ and two H1+ atoms. In the tenth O2- site, O2- is bonded in a distorted water-like geometry to one Fe+2.67+ and two H1+ atoms. In the eleventh O2- site, O2- is bonded in a distorted water-like geometry to one Fe+2.67+ and two H1+ atoms. In the twelfth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Fe+2.67+ and two H1+ atoms.