Rb2Sb4S7 crystallizes in the monoclinic P2_1/c space group. Rb(1) is bonded in a 10-coordinate geometry to one Sb(1), one S(3), two equivalent S(1), three equivalent S(2), and three equivalent S(4) atoms. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a distorted see-saw-like geometry to one Rb(1), one S(1), one S(2), one S(3), and one S(4) atom. In the second Sb site, Sb(2) is bonded in a distorted see-saw-like geometry to one S(1), one S(2), one S(3), and one S(4) atom. There are four inequivalent S sites. In the first S site, S(1) is bonded in a 4-coordinate geometry to two equivalent Rb(1), one Sb(1), and one Sb(2) atom. In the second S site, S(2) is bonded in a 4-coordinate geometry to three equivalent Rb(1), one Sb(1), and one Sb(2) atom. In the third S site, S(3) is bonded in an octahedral geometry to two equivalent Rb(1), two equivalent Sb(1), and two equivalent Sb(2) atoms. In the fourth S site, S(4) is bonded in a 4-coordinate geometry to three equivalent Rb(1), one Sb(1), and one Sb(2) atom.
Rb2Sb4S7 crystallizes in the monoclinic P2_1/c space group. Rb(1) is bonded in a 10-coordinate geometry to one Sb(1), one S(3), two equivalent S(1), three equivalent S(2), and three equivalent S(4) atoms. The Rb(1)-Sb(1) bond length is 3.92 Å. The Rb(1)-S(3) bond length is 3.35 Å. There is one shorter (3.42 Å) and one longer (3.82 Å) Rb(1)-S(1) bond length. There are a spread of Rb(1)-S(2) bond distances ranging from 3.38-3.92 Å. There are a spread of Rb(1)-S(4) bond distances ranging from 3.57-3.95 Å. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a distorted see-saw-like geometry to one Rb(1), one S(1), one S(2), one S(3), and one S(4) atom. The Sb(1)-S(1) bond length is 2.42 Å. The Sb(1)-S(2) bond length is 2.48 Å. The Sb(1)-S(3) bond length is 2.81 Å. The Sb(1)-S(4) bond length is 2.66 Å. In the second Sb site, Sb(2) is bonded in a distorted see-saw-like geometry to one S(1), one S(2), one S(3), and one S(4) atom. The Sb(2)-S(1) bond length is 2.62 Å. The Sb(2)-S(2) bond length is 2.49 Å. The Sb(2)-S(3) bond length is 2.83 Å. The Sb(2)-S(4) bond length is 2.43 Å. There are four inequivalent S sites. In the first S site, S(1) is bonded in a 4-coordinate geometry to two equivalent Rb(1), one Sb(1), and one Sb(2) atom. In the second S site, S(2) is bonded in a 4-coordinate geometry to three equivalent Rb(1), one Sb(1), and one Sb(2) atom. In the third S site, S(3) is bonded in an octahedral geometry to two equivalent Rb(1), two equivalent Sb(1), and two equivalent Sb(2) atoms. In the fourth S site, S(4) is bonded in a 4-coordinate geometry to three equivalent Rb(1), one Sb(1), and one Sb(2) atom.