Materials Data on Rb2CeI5 by Materials Project
Rb2CeI5 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Rb1+ is bonded in a 8-coordinate geometry to eight I1- atoms. There are a spread of Rb–I bond distances ranging from 3.73–4.01 Å. Ce3+ is bonded to seven I1- atoms to form distorted edge-sharing CeI7 pentagonal bipyramids. There are a spread of Ce–I bond distances ranging from 3.20–3.30 Å. There are four inequivalent I1- sites. In the first I1- site, I1- is bonded in a 5-coordinate geometry to four equivalent Rb1+ and one Ce3+ atom. In the second I1- site, I1- is bonded in a 4-coordinate geometry to two equivalent Rb1+ and two equivalent Ce3+ atoms. In the third I1- site, I1- is bonded to four equivalent Rb1+ and one Ce3+ atom to form a mixture of distorted corner, edge, and face-sharing IRb4Ce trigonal bipyramids. In the fourth I1- site, I1- is bonded to four equivalent Rb1+ and one Ce3+ atom to form a mixture of distorted corner, edge, and face-sharing IRb4Ce trigonal bipyramids.