Tb7MnI12 is trigonal omega-derived structured and crystallizes in the triclinic P-1 space group. There are four inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to one Mn(1), one I(2), one I(4), one I(5), and two equivalent I(1) atoms to form distorted TbMnI5 octahedra that share  a cornercorner with one Tb(1)MnI5 octahedra,  a cornercorner with one Tb(2)MnI5 octahedra,  a cornercorner with one Tb(3)MnI5 octahedra,  an edgeedge with one Tb(4)I6 octahedra,  an edgeedge with one Tb(1)MnI5 octahedra, edges with two equivalent Tb(2)MnI5 octahedra, and edges with two equivalent Tb(3)MnI5 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the second Tb site, Tb(2) is bonded to one Mn(1), one I(3), one I(5), one I(6), and two equivalent I(2) atoms to form distorted TbMnI5 octahedra that share  a cornercorner with one Tb(1)MnI5 octahedra,  a cornercorner with one Tb(2)MnI5 octahedra,  a cornercorner with one Tb(3)MnI5 octahedra,  an edgeedge with one Tb(4)I6 octahedra,  an edgeedge with one Tb(2)MnI5 octahedra, edges with two equivalent Tb(1)MnI5 octahedra, and edges with two equivalent Tb(3)MnI5 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the third Tb site, Tb(3) is bonded to one Mn(1), one I(1), one I(4), one I(6), and two equivalent I(3) atoms to form distorted TbMnI5 octahedra that share  a cornercorner with one Tb(1)MnI5 octahedra,  a cornercorner with one Tb(2)MnI5 octahedra,  a cornercorner with one Tb(3)MnI5 octahedra,  an edgeedge with one Tb(4)I6 octahedra,  an edgeedge with one Tb(3)MnI5 octahedra, edges with two equivalent Tb(1)MnI5 octahedra, and edges with two equivalent Tb(2)MnI5 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the fourth Tb site, Tb(4) is bonded to two equivalent I(4), two equivalent I(5), and two equivalent I(6) atoms to form edge-sharing TbI6 octahedra. Mn(1) is bonded in an octahedral geometry to two equivalent Tb(1), two equivalent Tb(2), and two equivalent Tb(3) atoms. There are six inequivalent I sites. In the first I site, I(1) is bonded in a distorted T-shaped geometry to one Tb(3) and two equivalent Tb(1) atoms. In the second I site, I(2) is bonded in a distorted T-shaped geometry to one Tb(1) and two equivalent Tb(2) atoms. In the third I site, I(3) is bonded in a distorted T-shaped geometry to one Tb(2) and two equivalent Tb(3) atoms. In the fourth I site, I(4) is bonded in a distorted T-shaped geometry to one Tb(1), one Tb(3), and one Tb(4) atom. In the fifth I site, I(5) is bonded in a distorted T-shaped geometry to one Tb(1), one Tb(2), and one Tb(4) atom. In the sixth I site, I(6) is bonded in a distorted T-shaped geometry to one Tb(2), one Tb(3), and one Tb(4) atom.
Tb7MnI12 is trigonal omega-derived structured and crystallizes in the triclinic P-1 space group. There are four inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to one Mn(1), one I(2), one I(4), one I(5), and two equivalent I(1) atoms to form distorted TbMnI5 octahedra that share  a cornercorner with one Tb(1)MnI5 octahedra,  a cornercorner with one Tb(2)MnI5 octahedra,  a cornercorner with one Tb(3)MnI5 octahedra,  an edgeedge with one Tb(4)I6 octahedra,  an edgeedge with one Tb(1)MnI5 octahedra, edges with two equivalent Tb(2)MnI5 octahedra, and edges with two equivalent Tb(3)MnI5 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. The Tb(1)-Mn(1) bond length is 2.64 Å. The Tb(1)-I(2) bond length is 3.13 Å. The Tb(1)-I(4) bond length is 3.19 Å. The Tb(1)-I(5) bond length is 3.20 Å. There is one shorter (3.09 Å) and one longer (3.43 Å) Tb(1)-I(1) bond length. In the second Tb site, Tb(2) is bonded to one Mn(1), one I(3), one I(5), one I(6), and two equivalent I(2) atoms to form distorted TbMnI5 octahedra that share  a cornercorner with one Tb(1)MnI5 octahedra,  a cornercorner with one Tb(2)MnI5 octahedra,  a cornercorner with one Tb(3)MnI5 octahedra,  an edgeedge with one Tb(4)I6 octahedra,  an edgeedge with one Tb(2)MnI5 octahedra, edges with two equivalent Tb(1)MnI5 octahedra, and edges with two equivalent Tb(3)MnI5 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. The Tb(2)-Mn(1) bond length is 2.60 Å. The Tb(2)-I(3) bond length is 3.13 Å. The Tb(2)-I(5) bond length is 3.18 Å. The Tb(2)-I(6) bond length is 3.20 Å. There is one shorter (3.09 Å) and one longer (3.47 Å) Tb(2)-I(2) bond length. In the third Tb site, Tb(3) is bonded to one Mn(1), one I(1), one I(4), one I(6), and two equivalent I(3) atoms to form distorted TbMnI5 octahedra that share  a cornercorner with one Tb(1)MnI5 octahedra,  a cornercorner with one Tb(2)MnI5 octahedra,  a cornercorner with one Tb(3)MnI5 octahedra,  an edgeedge with one Tb(4)I6 octahedra,  an edgeedge with one Tb(3)MnI5 octahedra, edges with two equivalent Tb(1)MnI5 octahedra, and edges with two equivalent Tb(2)MnI5 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. The Tb(3)-Mn(1) bond length is 2.63 Å. The Tb(3)-I(1) bond length is 3.13 Å. The Tb(3)-I(4) bond length is 3.21 Å. The Tb(3)-I(6) bond length is 3.19 Å. There is one shorter (3.08 Å) and one longer (3.45 Å) Tb(3)-I(3) bond length. In the fourth Tb site, Tb(4) is bonded to two equivalent I(4), two equivalent I(5), and two equivalent I(6) atoms to form edge-sharing TbI6 octahedra. Both Tb(4)-I(4) bond lengths are 3.05 Å. Both Tb(4)-I(5) bond lengths are 3.05 Å. Both Tb(4)-I(6) bond lengths are 3.05 Å. Mn(1) is bonded in an octahedral geometry to two equivalent Tb(1), two equivalent Tb(2), and two equivalent Tb(3) atoms. There are six inequivalent I sites. In the first I site, I(1) is bonded in a distorted T-shaped geometry to one Tb(3) and two equivalent Tb(1) atoms. In the second I site, I(2) is bonded in a distorted T-shaped geometry to one Tb(1) and two equivalent Tb(2) atoms. In the third I site, I(3) is bonded in a distorted T-shaped geometry to one Tb(2) and two equivalent Tb(3) atoms. In the fourth I site, I(4) is bonded in a distorted T-shaped geometry to one Tb(1), one Tb(3), and one Tb(4) atom. In the fifth I site, I(5) is bonded in a distorted T-shaped geometry to one Tb(1), one Tb(2), and one Tb(4) atom. In the sixth I site, I(6) is bonded in a distorted T-shaped geometry to one Tb(2), one Tb(3), and one Tb(4) atom.