Materials Data on CsSnI3 by Materials Project

CsSnI3 is Orthorhombic Perovskite structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Cs1+ is bonded in a 7-coordinate geometry to seven I1- atoms. There are a spread of Cs–I bond distances ranging from 4.05–4.43 Å. Sn2+ is bonded to six I1- atoms to form corner-sharing SnI6 octahedra. The corner-sharing octahedra tilt angles range from 6–21°. There are two shorter (3.16 Å) and four longer (3.17 Å) Sn–I bond lengths. There are two inequivalent I1- sites. In the first I1- site, I1- is bonded in a distorted see-saw-like geometry to two equivalent Cs1+ and two equivalent Sn2+ atoms. In the second I1- site, I1- is bonded to three equivalent Cs1+ and two equivalent Sn2+ atoms to form a mixture of distorted corner and edge-sharing ICs3Sn2 square pyramids.