Materials Data on Sr4I6O by Materials Project
Sr4OI6 crystallizes in the hexagonal P6_3mc space group. The structure is three-dimensional. there are two inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded in a distorted single-bond geometry to one O2- and seven I1- atoms. The Sr–O bond length is 2.45 Å. There are a spread of Sr–I bond distances ranging from 3.34–3.63 Å. In the second Sr2+ site, Sr2+ is bonded in a distorted single-bond geometry to one O2- and six I1- atoms. The Sr–O bond length is 2.41 Å. There are three shorter (3.47 Å) and three longer (3.63 Å) Sr–I bond lengths. O2- is bonded in a tetrahedral geometry to four Sr2+ atoms. There are two inequivalent I1- sites. In the first I1- site, I1- is bonded in a 5-coordinate geometry to five Sr2+ atoms. In the second I1- site, I1- is bonded in a 4-coordinate geometry to four Sr2+ atoms.