Rb2Mo9S11 crystallizes in the trigonal R-3c space group. Rb(1) is bonded in a 7-coordinate geometry to one S(3), three equivalent S(1), and three equivalent S(2) atoms. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one S(1), one S(3), and three equivalent S(2) atoms to form a mixture of distorted edge and corner-sharing MoS5 square pyramids. In the second Mo site, Mo(2) is bonded in a distorted see-saw-like geometry to two equivalent S(1) and two equivalent S(2) atoms. There are three inequivalent S sites. In the first S site, S(1) is bonded in a 6-coordinate geometry to two equivalent Rb(1), two equivalent Mo(1), and two equivalent Mo(2) atoms. In the second S site, S(2) is bonded in a 5-coordinate geometry to one Rb(1), one Mo(2), and three equivalent Mo(1) atoms. In the third S site, S(3) is bonded in a 4-coordinate geometry to one Rb(1) and three equivalent Mo(1) atoms.
Rb2Mo9S11 crystallizes in the trigonal R-3c space group. Rb(1) is bonded in a 7-coordinate geometry to one S(3), three equivalent S(1), and three equivalent S(2) atoms. The Rb(1)-S(3) bond length is 3.07 Å. All Rb(1)-S(1) bond lengths are 3.53 Å. All Rb(1)-S(2) bond lengths are 3.35 Å. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one S(1), one S(3), and three equivalent S(2) atoms to form a mixture of distorted edge and corner-sharing MoS5 square pyramids. The Mo(1)-S(1) bond length is 2.63 Å. The Mo(1)-S(3) bond length is 2.40 Å. There are a spread of Mo(1)-S(2) bond distances ranging from 2.47-2.53 Å. In the second Mo site, Mo(2) is bonded in a distorted see-saw-like geometry to two equivalent S(1) and two equivalent S(2) atoms. Both Mo(2)-S(1) bond lengths are 2.47 Å. Both Mo(2)-S(2) bond lengths are 2.46 Å. There are three inequivalent S sites. In the first S site, S(1) is bonded in a 6-coordinate geometry to two equivalent Rb(1), two equivalent Mo(1), and two equivalent Mo(2) atoms. In the second S site, S(2) is bonded in a 5-coordinate geometry to one Rb(1), one Mo(2), and three equivalent Mo(1) atoms. In the third S site, S(3) is bonded in a 4-coordinate geometry to one Rb(1) and three equivalent Mo(1) atoms.