Rb3Ge is alpha bismuth trifluoride structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded to four equivalent Rb(2) and four equivalent Ge(1) atoms to form a mixture of distorted corner, face, and edge-sharing RbRb4Ge4 tetrahedra. In the second Rb site, Rb(2) is bonded in a body-centered cubic geometry to eight equivalent Rb(1) atoms. Ge(1) is bonded in a body-centered cubic geometry to eight equivalent Rb(1) atoms.
Rb3Ge is alpha bismuth trifluoride structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded to four equivalent Rb(2) and four equivalent Ge(1) atoms to form a mixture of distorted corner, face, and edge-sharing RbRb4Ge4 tetrahedra. All Rb(1)-Rb(2) bond lengths are 3.95 Å. All Rb(1)-Ge(1) bond lengths are 3.95 Å. In the second Rb site, Rb(2) is bonded in a body-centered cubic geometry to eight equivalent Rb(1) atoms. Ge(1) is bonded in a body-centered cubic geometry to eight equivalent Rb(1) atoms.