Rb5Dy3Br12 crystallizes in the orthorhombic Amm2 space group. There are three inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 6-coordinate geometry to two equivalent Br(6) and four equivalent Br(5,7) atoms. In the second Rb site, Rb(2) is bonded in a 7-coordinate geometry to one Br(1); one Br(2); one Br(3); two equivalent Br(5,7); and two equivalent Br(6) atoms. In the third Rb site, Rb(3) is bonded in a 7-coordinate geometry to one Br(4); two equivalent Br(1); and four equivalent Br(5,7) atoms. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded to two equivalent Br(1); two equivalent Br(3); and two equivalent Br(5,7) atoms to form edge-sharing DyBr6 octahedra. In the second Dy site, Dy(2) is bonded to two equivalent Br(2), two equivalent Br(4), and two equivalent Br(6) atoms to form edge-sharing DyBr6 octahedra. There are six inequivalent Br sites. In the first Br site, Br(1) is bonded to one Rb(2), one Rb(3), and two equivalent Dy(1) atoms to form distorted corner-sharing BrRb2Dy2 trigonal pyramids. In the second Br site, Br(2) is bonded to two equivalent Rb(2) and two equivalent Dy(2) atoms to form distorted corner-sharing BrRb2Dy2 trigonal pyramids. In the third Br site, Br(3) is bonded in a 3-coordinate geometry to one Rb(2) and two equivalent Dy(1) atoms. In the fourth Br site, Br(4) is bonded in a 3-coordinate geometry to one Rb(3) and two equivalent Dy(2) atoms. In the fifth Br site, Br(5,7) is bonded in a 5-coordinate geometry to two equivalent Rb(1), two equivalent Rb(3), and one Dy(1) atom. In the sixth Br site, Br(6) is bonded in a 5-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), and one Dy(2) atom.
Rb5Dy3Br12 crystallizes in the orthorhombic Amm2 space group. There are three inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 6-coordinate geometry to two equivalent Br(6) and four equivalent Br(5,7) atoms. Both Rb(1)-Br(6) bond lengths are 3.43 Å. All Rb(1)-Br(5,7) bond lengths are 3.43 Å. In the second Rb site, Rb(2) is bonded in a 7-coordinate geometry to one Br(1); one Br(2); one Br(3); two equivalent Br(5,7); and two equivalent Br(6) atoms. The Rb(2)-Br(1) bond length is 3.45 Å. The Rb(2)-Br(2) bond length is 3.46 Å. The Rb(2)-Br(3) bond length is 3.49 Å. Both Rb(2)-Br(5,7) bond lengths are 3.44 Å. Both Rb(2)-Br(6) bond lengths are 3.44 Å. In the third Rb site, Rb(3) is bonded in a 7-coordinate geometry to one Br(4); two equivalent Br(1); and four equivalent Br(5,7) atoms. The Rb(3)-Br(4) bond length is 3.48 Å. Both Rb(3)-Br(1) bond lengths are 3.46 Å. All Rb(3)-Br(5,7) bond lengths are 3.44 Å. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded to two equivalent Br(1); two equivalent Br(3); and two equivalent Br(5,7) atoms to form edge-sharing DyBr6 octahedra. Both Dy(1)-Br(1) bond lengths are 2.91 Å. Both Dy(1)-Br(3) bond lengths are 2.88 Å. Both Dy(1)-Br(5,7) bond lengths are 2.81 Å. In the second Dy site, Dy(2) is bonded to two equivalent Br(2), two equivalent Br(4), and two equivalent Br(6) atoms to form edge-sharing DyBr6 octahedra. Both Dy(2)-Br(2) bond lengths are 2.91 Å. Both Dy(2)-Br(4) bond lengths are 2.88 Å. Both Dy(2)-Br(6) bond lengths are 2.81 Å. There are six inequivalent Br sites. In the first Br site, Br(1) is bonded to one Rb(2), one Rb(3), and two equivalent Dy(1) atoms to form distorted corner-sharing BrRb2Dy2 trigonal pyramids. In the second Br site, Br(2) is bonded to two equivalent Rb(2) and two equivalent Dy(2) atoms to form distorted corner-sharing BrRb2Dy2 trigonal pyramids. In the third Br site, Br(3) is bonded in a 3-coordinate geometry to one Rb(2) and two equivalent Dy(1) atoms. In the fourth Br site, Br(4) is bonded in a 3-coordinate geometry to one Rb(3) and two equivalent Dy(2) atoms. In the fifth Br site, Br(5,7) is bonded in a 5-coordinate geometry to two equivalent Rb(1), two equivalent Rb(3), and one Dy(1) atom. In the sixth Br site, Br(6) is bonded in a 5-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), and one Dy(2) atom.