Rb3Au3Sb2 crystallizes in the trigonal R-3m space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded to six equivalent Au(1) and six equivalent Sb(1) atoms to form a mixture of distorted corner and edge-sharing RbSb6Au6 cuboctahedra. In the second Rb site, Rb(2) is bonded in a 10-coordinate geometry to six equivalent Au(1) and four equivalent Sb(1) atoms. Au(1) is bonded in a distorted linear geometry to two equivalent Rb(1), four equivalent Rb(2), and two equivalent Sb(1) atoms. Sb(1) is bonded in a 10-coordinate geometry to three equivalent Rb(1), four equivalent Rb(2), and three equivalent Au(1) atoms.
Rb3Au3Sb2 crystallizes in the trigonal R-3m space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded to six equivalent Au(1) and six equivalent Sb(1) atoms to form a mixture of distorted corner and edge-sharing RbSb6Au6 cuboctahedra. All Rb(1)-Au(1) bond lengths are 4.11 Å. All Rb(1)-Sb(1) bond lengths are 4.16 Å. In the second Rb site, Rb(2) is bonded in a 10-coordinate geometry to six equivalent Au(1) and four equivalent Sb(1) atoms. All Rb(2)-Au(1) bond lengths are 3.71 Å. There is one shorter (3.65 Å) and three longer (3.77 Å) Rb(2)-Sb(1) bond lengths. Au(1) is bonded in a distorted linear geometry to two equivalent Rb(1), four equivalent Rb(2), and two equivalent Sb(1) atoms. Both Au(1)-Sb(1) bond lengths are 2.67 Å. Sb(1) is bonded in a 10-coordinate geometry to three equivalent Rb(1), four equivalent Rb(2), and three equivalent Au(1) atoms.