Materials Data on Rb2Se3 by Materials Project
Rb2Se3 crystallizes in the orthorhombic Cmc2_1 space group. The structure is three-dimensional. there are two inequivalent Rb sites. In the first Rb site, Rb is bonded in a 7-coordinate geometry to seven Se atoms. There are a spread of Rb–Se bond distances ranging from 3.50–3.65 Å. In the second Rb site, Rb is bonded in a 8-coordinate geometry to eight Se atoms. There are a spread of Rb–Se bond distances ranging from 3.45–3.88 Å. There are two inequivalent Se sites. In the first Se site, Se is bonded to six Rb and one Se atom to form a mixture of distorted corner, edge, and face-sharing SeRb6Se pentagonal bipyramids. The Se–Se bond length is 2.42 Å. In the second Se site, Se is bonded in a 5-coordinate geometry to three Rb and two equivalent Se atoms.