Materials Data on Sr3Sn2O7 by Materials Project
Sr3Sn2O7 is Orthorhombic Perovskite-like structured and crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. there are two inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded in a 11-coordinate geometry to eleven O2- atoms. There are a spread of Sr–O bond distances ranging from 2.54–3.15 Å. In the second Sr2+ site, Sr2+ is bonded in a 4-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.43–2.96 Å. Sn4+ is bonded to six O2- atoms to form corner-sharing SnO6 octahedra. The corner-sharing octahedra tilt angles range from 17–24°. There are a spread of Sn–O bond distances ranging from 2.07–2.10 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 6-coordinate geometry to four Sr2+ and two equivalent Sn4+ atoms. In the second O2- site, O2- is bonded in a 4-coordinate geometry to four Sr2+ and two equivalent Sn4+ atoms. In the third O2- site, O2- is bonded in a 5-coordinate geometry to four equivalent Sr2+ and one Sn4+ atom. In the fourth O2- site, O2- is bonded in a 5-coordinate geometry to three equivalent Sr2+ and two equivalent Sn4+ atoms.