Materials Data on Cs2Li3I5 by Materials Project
Cs2Li3I5 crystallizes in the monoclinic C2/m 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 3.92–3.99 Å. There are two inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded to six I1- atoms to form LiI6 octahedra that share edges with two equivalent LiI6 octahedra and edges with four equivalent LiI4 tetrahedra. There are two shorter (3.11 Å) and four longer (3.17 Å) Li–I bond lengths. In the second Li1+ site, Li1+ is bonded to four I1- atoms to form LiI4 tetrahedra that share corners with three equivalent LiI4 tetrahedra and edges with two equivalent LiI6 octahedra. There are a spread of Li–I bond distances ranging from 2.74–2.79 Å. There are three inequivalent I1- sites. In the first I1- site, I1- is bonded in a distorted linear geometry to four equivalent Cs1+ and two equivalent Li1+ atoms. In the second I1- site, I1- is bonded in a 6-coordinate geometry to three equivalent Cs1+ and three Li1+ atoms. In the third I1- site, I1- is bonded in a 5-coordinate geometry to two equivalent Cs1+ and three Li1+ atoms.