Rb3Sb is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a body-centered cubic geometry to eight equivalent Rb(2) atoms. In the second Rb site, Rb(2) is bonded to four equivalent Rb(1) and four equivalent Sb(1) atoms to form a mixture of distorted corner, face, and edge-sharing RbRb4Sb4 tetrahedra. Sb(1) is bonded in a body-centered cubic geometry to eight equivalent Rb(2) atoms.
Rb3Sb is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a body-centered cubic geometry to eight equivalent Rb(2) atoms. All Rb(1)-Rb(2) bond lengths are 3.84 Å. In the second Rb site, Rb(2) is bonded to four equivalent Rb(1) and four equivalent Sb(1) atoms to form a mixture of distorted corner, face, and edge-sharing RbRb4Sb4 tetrahedra. All Rb(2)-Sb(1) bond lengths are 3.84 Å. Sb(1) is bonded in a body-centered cubic geometry to eight equivalent Rb(2) atoms.