Materials Data on Rb by Materials Project

Rb is alpha structured and crystallizes in the cubic I-43m space group. The structure is three-dimensional and consists of two rubidium molecules and one Rb framework. In the Rb framework, there are three inequivalent Rb sites. In the first Rb site, Rb is bonded in a trigonal non-coplanar geometry to three equivalent Rb atoms. All Rb–Rb bond lengths are 4.89 Å. In the second Rb site, Rb is bonded in a 12-coordinate geometry to eight Rb atoms. There are a spread of Rb–Rb bond distances ranging from 4.67–5.11 Å. In the third Rb site, Rb is bonded in a 6-coordinate geometry to eight Rb atoms. There are one shorter (4.49 Å) and two longer (4.66 Å) Rb–Rb bond lengths.