RbSm2Br5 crystallizes in the monoclinic P2_1/c space group. Rb(1) is bonded in a 6-coordinate geometry to one Br(2), one Br(4), two equivalent Br(1), and two equivalent Br(3) atoms. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 6-coordinate geometry to one Br(2), two equivalent Br(3), two equivalent Br(4), and two equivalent Br(5) atoms. In the second Sm site, Sm(2) is bonded in a 6-coordinate geometry to one Br(1), one Br(2), one Br(3), one Br(4), and two equivalent Br(5) atoms. There are five inequivalent Br sites. In the first Br site, Br(1) is bonded in a 3-coordinate geometry to two equivalent Rb(1) and one Sm(2) atom. In the second Br site, Br(2) is bonded in a distorted trigonal non-coplanar geometry to one Rb(1), one Sm(1), and one Sm(2) atom. In the third Br site, Br(3) is bonded in a 5-coordinate geometry to two equivalent Rb(1), one Sm(2), and two equivalent Sm(1) atoms. In the fourth Br site, Br(4) is bonded in a 4-coordinate geometry to one Rb(1), one Sm(2), and two equivalent Sm(1) atoms. In the fifth Br site, Br(5) is bonded to two equivalent Sm(1) and two equivalent Sm(2) atoms to form a mixture of distorted corner and edge-sharing BrSm4 tetrahedra.
RbSm2Br5 crystallizes in the monoclinic P2_1/c space group. Rb(1) is bonded in a 6-coordinate geometry to one Br(2), one Br(4), two equivalent Br(1), and two equivalent Br(3) atoms. The Rb(1)-Br(2) bond length is 3.41 Å. The Rb(1)-Br(4) bond length is 3.69 Å. There is one shorter (3.38 Å) and one longer (3.67 Å) Rb(1)-Br(1) bond length. There is one shorter (3.53 Å) and one longer (3.74 Å) Rb(1)-Br(3) bond length. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 6-coordinate geometry to one Br(2), two equivalent Br(3), two equivalent Br(4), and two equivalent Br(5) atoms. The Sm(1)-Br(2) bond length is 2.90 Å. There is one shorter (2.92 Å) and one longer (3.62 Å) Sm(1)-Br(3) bond length. There is one shorter (3.08 Å) and one longer (3.10 Å) Sm(1)-Br(4) bond length. There is one shorter (3.03 Å) and one longer (3.08 Å) Sm(1)-Br(5) bond length. In the second Sm site, Sm(2) is bonded in a 6-coordinate geometry to one Br(1), one Br(2), one Br(3), one Br(4), and two equivalent Br(5) atoms. The Sm(2)-Br(1) bond length is 2.98 Å. The Sm(2)-Br(2) bond length is 2.94 Å. The Sm(2)-Br(3) bond length is 3.09 Å. The Sm(2)-Br(4) bond length is 3.06 Å. There is one shorter (2.95 Å) and one longer (3.08 Å) Sm(2)-Br(5) bond length. There are five inequivalent Br sites. In the first Br site, Br(1) is bonded in a 3-coordinate geometry to two equivalent Rb(1) and one Sm(2) atom. In the second Br site, Br(2) is bonded in a distorted trigonal non-coplanar geometry to one Rb(1), one Sm(1), and one Sm(2) atom. In the third Br site, Br(3) is bonded in a 5-coordinate geometry to two equivalent Rb(1), one Sm(2), and two equivalent Sm(1) atoms. In the fourth Br site, Br(4) is bonded in a 4-coordinate geometry to one Rb(1), one Sm(2), and two equivalent Sm(1) atoms. In the fifth Br site, Br(5) is bonded to two equivalent Sm(1) and two equivalent Sm(2) atoms to form a mixture of distorted corner and edge-sharing BrSm4 tetrahedra.