Materials Data on Fe3B7IO13 by Materials Project

Fe3B7O13I crystallizes in the trigonal R3c space group. The structure is three-dimensional. Fe2+ is bonded in a distorted rectangular see-saw-like geometry to four O2- and one I1- atom. There are a spread of Fe–O bond distances ranging from 2.05–2.20 Å. The Fe–I bond length is 2.85 Å. There are three inequivalent B3+ sites. In the first B3+ site, B3+ is bonded to four O2- atoms to form corner-sharing BO4 tetrahedra. There are a spread of B–O bond distances ranging from 1.46–1.52 Å. In the second B3+ site, B3+ is bonded to four O2- atoms to form corner-sharing BO4 tetrahedra. There are a spread of B–O bond distances ranging from 1.45–1.57 Å. In the third B3+ site, B3+ is bonded in a trigonal planar geometry to three equivalent O2- atoms. All B–O bond lengths are 1.39 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a trigonal non-coplanar geometry to three equivalent B3+ atoms. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to one Fe2+ and two B3+ atoms. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to one Fe2+ and two B3+ atoms. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Fe2+ and two B3+ atoms. In the fifth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Fe2+ and two B3+ atoms. I1- is bonded in a 3-coordinate geometry to three equivalent Fe2+ atoms.