Tm4Fe34C3 crystallizes in the triclinic P-1 space group. There are two inequivalent Tm sites. In the first Tm site, Tm(1) is bonded in a distorted bent 120 degrees geometry to one Fe(11), one Fe(12), one Fe(7), one Fe(9), two equivalent Fe(17), three equivalent Fe(5), one C(1), and one C(2) atom. In the second Tm site, Tm(2) is bonded in a distorted single-bond geometry to one Fe(10), one Fe(11), one Fe(12), one Fe(8), two equivalent Fe(16), two equivalent Fe(18), three equivalent Fe(4), three equivalent Fe(6), and one C(1) atom. There are eighteen inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a single-bond geometry to one Fe(11), one Fe(12), one Fe(17), one Fe(5), one Fe(8), and one C(1) atom. In the second Fe site, Fe(2) is bonded in a single-bond geometry to one Fe(11), one Fe(12), one Fe(16), one Fe(18), one Fe(4), one Fe(6), one Fe(7), and one C(1) atom. In the third Fe site, Fe(3) is bonded in a single-bond geometry to one Fe(12), one Fe(17), one Fe(5), one Fe(7), one Fe(9), and one C(2) atom. In the fourth Fe site, Fe(4) is bonded to three equivalent Tm(2), one Fe(10), one Fe(12), one Fe(13), one Fe(18), one Fe(2), one Fe(6), one Fe(8), and two equivalent Fe(16) atoms to form FeTm3Fe9 cuboctahedra that share  a cornercorner with one Fe(10)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(12)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(5)Tm3Fe9 cuboctahedra, corners with two equivalent Fe(18)Tm2Fe10 cuboctahedra, corners with two equivalent Fe(6)Tm3Fe9 cuboctahedra, corners with three equivalent Fe(11)Tm2Fe10 cuboctahedra, corners with three equivalent Fe(4)Tm3Fe9 cuboctahedra, corners with two equivalent C(1)Tm2Fe4 octahedra,  an edgeedge with one Fe(10)Tm2Fe10 cuboctahedra,  an edgeedge with one Fe(11)Tm2Fe10 cuboctahedra,  an edgeedge with one Fe(12)Tm2Fe10 cuboctahedra,  an edgeedge with one Fe(18)Tm2Fe10 cuboctahedra,  an edgeedge with one Fe(4)Tm3Fe9 cuboctahedra, edges with two equivalent Fe(6)Tm3Fe9 cuboctahedra,  a faceface with one Fe(10)Tm2Fe10 cuboctahedra,  a faceface with one Fe(11)Tm2Fe10 cuboctahedra,  a faceface with one Fe(12)Tm2Fe10 cuboctahedra,  a faceface with one Fe(4)Tm3Fe9 cuboctahedra, faces with three equivalent Fe(18)Tm2Fe10 cuboctahedra, faces with three equivalent Fe(6)Tm3Fe9 cuboctahedra, and  a faceface with one C(1)Tm2Fe4 octahedra. The corner-sharing octahedral tilt angles range from 66-70°. In the fifth Fe site, Fe(5) is bonded to three equivalent Tm(1), one Fe(1), one Fe(11), one Fe(13), one Fe(15), one Fe(3), one Fe(7), one Fe(9), and two equivalent Fe(17) atoms to form FeTm3Fe9 cuboctahedra that share  a cornercorner with one Fe(11)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(9)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(4)Tm3Fe9 cuboctahedra,  a cornercorner with one Fe(6)Tm3Fe9 cuboctahedra, corners with three equivalent Fe(12)Tm2Fe10 cuboctahedra, corners with three equivalent Fe(5)Tm3Fe9 cuboctahedra, corners with two equivalent C(1)Tm2Fe4 octahedra, corners with two equivalent C(2)Tm2Fe4 octahedra,  an edgeedge with one Fe(11)Tm2Fe10 cuboctahedra,  an edgeedge with one Fe(12)Tm2Fe10 cuboctahedra,  an edgeedge with one Fe(9)Tm2Fe10 cuboctahedra,  an edgeedge with one Fe(5)Tm3Fe9 cuboctahedra,  a faceface with one Fe(11)Tm2Fe10 cuboctahedra,  a faceface with one Fe(12)Tm2Fe10 cuboctahedra,  a faceface with one Fe(18)Tm2Fe10 cuboctahedra,  a faceface with one Fe(9)Tm2Fe10 cuboctahedra,  a faceface with one Fe(5)Tm3Fe9 cuboctahedra,  a faceface with one C(1)Tm2Fe4 octahedra, and  a faceface with one C(2)Tm2Fe4 octahedra. The corner-sharing octahedral tilt angles range from 63-69°. In the sixth Fe site, Fe(6) is bonded to three equivalent Tm(2), one Fe(10), one Fe(11), one Fe(14), one Fe(16), one Fe(2), one Fe(4), one Fe(8), and two equivalent Fe(18) atoms to form FeTm3Fe9 cuboctahedra that share  a cornercorner with one Fe(10)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(11)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(5)Tm3Fe9 cuboctahedra, corners with two equivalent Fe(18)Tm2Fe10 cuboctahedra, corners with two equivalent Fe(4)Tm3Fe9 cuboctahedra, corners with three equivalent Fe(12)Tm2Fe10 cuboctahedra, corners with three equivalent Fe(6)Tm3Fe9 cuboctahedra, corners with two equivalent C(1)Tm2Fe4 octahedra,  an edgeedge with one Fe(10)Tm2Fe10 cuboctahedra,  an edgeedge with one Fe(11)Tm2Fe10 cuboctahedra,  an edgeedge with one Fe(12)Tm2Fe10 cuboctahedra,  an edgeedge with one Fe(6)Tm3Fe9 cuboctahedra, edges with two equivalent Fe(4)Tm3Fe9 cuboctahedra,  a faceface with one Fe(10)Tm2Fe10 cuboctahedra,  a faceface with one Fe(11)Tm2Fe10 cuboctahedra,  a faceface with one Fe(12)Tm2Fe10 cuboctahedra,  a faceface with one Fe(6)Tm3Fe9 cuboctahedra, faces with three equivalent Fe(18)Tm2Fe10 cuboctahedra, faces with three equivalent Fe(4)Tm3Fe9 cuboctahedra, and  a faceface with one C(1)Tm2Fe4 octahedra. The corner-sharing octahedral tilt angles range from 65-69°. In the seventh Fe site, Fe(7) is bonded in a 14-coordinate geometry to one Tm(1), one Fe(11), one Fe(12), one Fe(13), one Fe(14), one Fe(15), one Fe(16), one Fe(17), one Fe(18), one Fe(2), one Fe(3), one Fe(5), one Fe(8), and one Fe(9) atom. In the eighth Fe site, Fe(8) is bonded in a 14-coordinate geometry to one Tm(2), one Fe(1), one Fe(10), one Fe(11), one Fe(12), one Fe(13), one Fe(14), one Fe(15), one Fe(16), one Fe(17), one Fe(18), one Fe(4), one Fe(6), and one Fe(7) atom. In the ninth Fe site, Fe(9) is bonded to two equivalent Tm(1), two equivalent Fe(15), two equivalent Fe(17), two equivalent Fe(3), two equivalent Fe(5), and two equivalent Fe(7) atoms to form FeTm2Fe10 cuboctahedra that share corners with two equivalent Fe(11)Tm2Fe10 cuboctahedra, corners with two equivalent Fe(12)Tm2Fe10 cuboctahedra, corners with two equivalent Fe(18)Tm2Fe10 cuboctahedra, corners with two equivalent Fe(5)Tm3Fe9 cuboctahedra, corners with two equivalent C(1)Tm2Fe4 octahedra, edges with two equivalent Fe(5)Tm3Fe9 cuboctahedra, faces with two equivalent Fe(11)Tm2Fe10 cuboctahedra, faces with two equivalent Fe(12)Tm2Fe10 cuboctahedra, faces with two equivalent Fe(5)Tm3Fe9 cuboctahedra, and faces with two equivalent C(2)Tm2Fe4 octahedra. The corner-sharing octahedral tilt angles are 44°. In the tenth Fe site, Fe(10) is bonded to two equivalent Tm(2), two equivalent Fe(16), two equivalent Fe(18), two equivalent Fe(4), two equivalent Fe(6), and two equivalent Fe(8) atoms to form FeTm2Fe10 cuboctahedra that share corners with two equivalent Fe(11)Tm2Fe10 cuboctahedra, corners with two equivalent Fe(12)Tm2Fe10 cuboctahedra, corners with two equivalent Fe(4)Tm3Fe9 cuboctahedra, corners with two equivalent Fe(6)Tm3Fe9 cuboctahedra, corners with two equivalent C(1)Tm2Fe4 octahedra, edges with two equivalent Fe(18)Tm2Fe10 cuboctahedra, edges with two equivalent Fe(4)Tm3Fe9 cuboctahedra, edges with two equivalent Fe(6)Tm3Fe9 cuboctahedra, faces with two equivalent Fe(11)Tm2Fe10 cuboctahedra, faces with two equivalent Fe(12)Tm2Fe10 cuboctahedra, faces with two equivalent Fe(18)Tm2Fe10 cuboctahedra, faces with two equivalent Fe(4)Tm3Fe9 cuboctahedra, and faces with two equivalent Fe(6)Tm3Fe9 cuboctahedra. The corner-sharing octahedral tilt angles are 44°. In the eleventh Fe site, Fe(11) is bonded to one Tm(1), one Tm(2), one Fe(1), one Fe(13), one Fe(14), one Fe(17), one Fe(18), one Fe(2), one Fe(5), one Fe(6), one Fe(7), and one Fe(8) atom to form distorted FeTm2Fe10 cuboctahedra that share  a cornercorner with one Fe(10)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(18)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(9)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(5)Tm3Fe9 cuboctahedra,  a cornercorner with one Fe(6)Tm3Fe9 cuboctahedra, corners with two equivalent Fe(12)Tm2Fe10 cuboctahedra, corners with three equivalent Fe(4)Tm3Fe9 cuboctahedra,  a cornercorner with one C(2)Tm2Fe4 octahedra,  an edgeedge with one Fe(18)Tm2Fe10 cuboctahedra,  an edgeedge with one Fe(4)Tm3Fe9 cuboctahedra,  an edgeedge with one Fe(5)Tm3Fe9 cuboctahedra,  an edgeedge with one Fe(6)Tm3Fe9 cuboctahedra,  a faceface with one Fe(10)Tm2Fe10 cuboctahedra,  a faceface with one Fe(18)Tm2Fe10 cuboctahedra,  a faceface with one Fe(9)Tm2Fe10 cuboctahedra,  a faceface with one Fe(4)Tm3Fe9 cuboctahedra,  a faceface with one Fe(5)Tm3Fe9 cuboctahedra,  a faceface with one Fe(6)Tm3Fe9 cuboctahedra, faces with two equivalent Fe(12)Tm2Fe10 cuboctahedra, and faces with two equivalent C(1)Tm2Fe4 octahedra. The corner-sharing octahedral tilt angles are 44°. In the twelfth Fe site, Fe(12) is bonded to one Tm(1), one Tm(2), one Fe(1), one Fe(13), one Fe(14), one Fe(15), one Fe(16), one Fe(2), one Fe(3), one Fe(4), one Fe(7), and one Fe(8) atom to form distorted FeTm2Fe10 cuboctahedra that share  a cornercorner with one Fe(10)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(9)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(4)Tm3Fe9 cuboctahedra, corners with two equivalent Fe(11)Tm2Fe10 cuboctahedra, corners with two equivalent Fe(18)Tm2Fe10 cuboctahedra, corners with three equivalent Fe(5)Tm3Fe9 cuboctahedra, corners with three equivalent Fe(6)Tm3Fe9 cuboctahedra,  an edgeedge with one Fe(4)Tm3Fe9 cuboctahedra,  an edgeedge with one Fe(5)Tm3Fe9 cuboctahedra,  an edgeedge with one Fe(6)Tm3Fe9 cuboctahedra,  a faceface with one Fe(10)Tm2Fe10 cuboctahedra,  a faceface with one Fe(9)Tm2Fe10 cuboctahedra,  a faceface with one Fe(4)Tm3Fe9 cuboctahedra,  a faceface with one Fe(5)Tm3Fe9 cuboctahedra,  a faceface with one Fe(6)Tm3Fe9 cuboctahedra, faces with two equivalent Fe(11)Tm2Fe10 cuboctahedra, faces with two equivalent Fe(18)Tm2Fe10 cuboctahedra,  a faceface with one C(2)Tm2Fe4 octahedra, and faces with two equivalent C(1)Tm2Fe4 octahedra. In the thirteenth Fe site, Fe(13) is bonded in a single-bond geometry to one Fe(11), one Fe(12), one Fe(18), one Fe(4), one Fe(5), one Fe(7), one Fe(8), and one C(1) atom. In the fourteenth Fe site, Fe(14) is bonded in a single-bond geometry to one Fe(11), one Fe(12), one Fe(16), one Fe(17), one Fe(6), one Fe(7), one Fe(8), and one C(1) atom. In the fifteenth Fe site, Fe(15) is bonded in a single-bond geometry to one Fe(12), one Fe(17), one Fe(5), one Fe(7), one Fe(8), one Fe(9), and one C(2) atom. In the sixteenth Fe site, Fe(16) is bonded in a 12-coordinate geometry to two equivalent Tm(2), one Fe(10), one Fe(12), one Fe(14), one Fe(18), one Fe(2), one Fe(6), one Fe(7), one Fe(8), and two equivalent Fe(4) atoms. In the seventeenth Fe site, Fe(17) is bonded in a 12-coordinate geometry to two equivalent Tm(1), one Fe(1), one Fe(11), one Fe(14), one Fe(15), one Fe(3), one Fe(7), one Fe(8), one Fe(9), and two equivalent Fe(5) atoms. In the eighteenth Fe site, Fe(18) is bonded to two equivalent Tm(2), one Fe(10), one Fe(11), one Fe(13), one Fe(16), one Fe(2), one Fe(4), one Fe(7), one Fe(8), and two equivalent Fe(6) atoms to form distorted FeTm2Fe10 cuboctahedra that share  a cornercorner with one Fe(11)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(18)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(9)Tm2Fe10 cuboctahedra, corners with two equivalent Fe(12)Tm2Fe10 cuboctahedra, corners with two equivalent Fe(4)Tm3Fe9 cuboctahedra, corners with two equivalent Fe(6)Tm3Fe9 cuboctahedra, corners with two equivalent C(1)Tm2Fe4 octahedra,  an edgeedge with one Fe(10)Tm2Fe10 cuboctahedra,  an edgeedge with one Fe(11)Tm2Fe10 cuboctahedra,  an edgeedge with one Fe(4)Tm3Fe9 cuboctahedra,  an edgeedge with one C(1)Tm2Fe4 octahedra,  a faceface with one Fe(10)Tm2Fe10 cuboctahedra,  a faceface with one Fe(11)Tm2Fe10 cuboctahedra,  a faceface with one Fe(18)Tm2Fe10 cuboctahedra,  a faceface with one Fe(5)Tm3Fe9 cuboctahedra, faces with two equivalent Fe(12)Tm2Fe10 cuboctahedra, faces with three equivalent Fe(4)Tm3Fe9 cuboctahedra, and faces with three equivalent Fe(6)Tm3Fe9 cuboctahedra. The corner-sharing octahedral tilt angles range from 25-30°. There are two inequivalent C sites. In the first C site, C(1) is bonded to one Tm(1), one Tm(2), one Fe(1), one Fe(13), one Fe(14), and one Fe(2) atom to form CTm2Fe4 octahedra that share  a cornercorner with one Fe(10)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(9)Tm2Fe10 cuboctahedra, corners with two equivalent Fe(18)Tm2Fe10 cuboctahedra, corners with two equivalent Fe(4)Tm3Fe9 cuboctahedra, corners with two equivalent Fe(5)Tm3Fe9 cuboctahedra, corners with two equivalent Fe(6)Tm3Fe9 cuboctahedra,  a cornercorner with one C(2)Tm2Fe4 octahedra,  an edgeedge with one Fe(18)Tm2Fe10 cuboctahedra,  a faceface with one Fe(4)Tm3Fe9 cuboctahedra,  a faceface with one Fe(5)Tm3Fe9 cuboctahedra,  a faceface with one Fe(6)Tm3Fe9 cuboctahedra, faces with two equivalent Fe(11)Tm2Fe10 cuboctahedra, and faces with two equivalent Fe(12)Tm2Fe10 cuboctahedra. The corner-sharing octahedral tilt angles are 62°. In the second C site, C(2) is bonded to two equivalent Tm(1), two equivalent Fe(15), and two equivalent Fe(3) atoms to form CTm2Fe4 octahedra that share corners with two equivalent Fe(11)Tm2Fe10 cuboctahedra, corners with four equivalent Fe(5)Tm3Fe9 cuboctahedra, corners with two equivalent C(1)Tm2Fe4 octahedra, faces with two equivalent Fe(12)Tm2Fe10 cuboctahedra, faces with two equivalent Fe(9)Tm2Fe10 cuboctahedra, and faces with two equivalent Fe(5)Tm3Fe9 cuboctahedra. The corner-sharing octahedral tilt angles are 62°.
Tm4Fe34C3 crystallizes in the triclinic P-1 space group. There are two inequivalent Tm sites. In the first Tm site, Tm(1) is bonded in a distorted bent 120 degrees geometry to one Fe(11), one Fe(12), one Fe(7), one Fe(9), two equivalent Fe(17), three equivalent Fe(5), one C(1), and one C(2) atom. The Tm(1)-Fe(11) bond length is 3.27 Å. The Tm(1)-Fe(12) bond length is 3.35 Å. The Tm(1)-Fe(7) bond length is 3.04 Å. The Tm(1)-Fe(9) bond length is 3.26 Å. There is one shorter (3.01 Å) and one longer (3.02 Å) Tm(1)-Fe(17) bond length. There are a spread of Tm(1)-Fe(5) bond distances ranging from 3.05-3.33 Å. The Tm(1)-C(1) bond length is 2.48 Å. The Tm(1)-C(2) bond length is 2.49 Å. In the second Tm site, Tm(2) is bonded in a distorted single-bond geometry to one Fe(10), one Fe(11), one Fe(12), one Fe(8), two equivalent Fe(16), two equivalent Fe(18), three equivalent Fe(4), three equivalent Fe(6), and one C(1) atom. The Tm(2)-Fe(10) bond length is 3.24 Å. The Tm(2)-Fe(11) bond length is 3.30 Å. The Tm(2)-Fe(12) bond length is 3.29 Å. The Tm(2)-Fe(8) bond length is 3.03 Å. There is one shorter (2.98 Å) and one longer (3.06 Å) Tm(2)-Fe(16) bond length. There is one shorter (3.00 Å) and one longer (3.05 Å) Tm(2)-Fe(18) bond length. There are a spread of Tm(2)-Fe(4) bond distances ranging from 3.05-3.27 Å. There are a spread of Tm(2)-Fe(6) bond distances ranging from 3.06-3.29 Å. The Tm(2)-C(1) bond length is 2.50 Å. There are eighteen inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a single-bond geometry to one Fe(11), one Fe(12), one Fe(17), one Fe(5), one Fe(8), and one C(1) atom. The Fe(1)-Fe(11) bond length is 2.46 Å. The Fe(1)-Fe(12) bond length is 2.45 Å. The Fe(1)-Fe(17) bond length is 2.55 Å. The Fe(1)-Fe(5) bond length is 2.51 Å. The Fe(1)-Fe(8) bond length is 2.64 Å. The Fe(1)-C(1) bond length is 1.91 Å. In the second Fe site, Fe(2) is bonded in a single-bond geometry to one Fe(11), one Fe(12), one Fe(16), one Fe(18), one Fe(4), one Fe(6), one Fe(7), and one C(1) atom. The Fe(2)-Fe(11) bond length is 2.47 Å. The Fe(2)-Fe(12) bond length is 2.46 Å. The Fe(2)-Fe(16) bond length is 2.56 Å. The Fe(2)-Fe(18) bond length is 2.57 Å. The Fe(2)-Fe(4) bond length is 2.52 Å. The Fe(2)-Fe(6) bond length is 2.51 Å. The Fe(2)-Fe(7) bond length is 2.62 Å. The Fe(2)-C(1) bond length is 1.91 Å. In the third Fe site, Fe(3) is bonded in a single-bond geometry to one Fe(12), one Fe(17), one Fe(5), one Fe(7), one Fe(9), and one C(2) atom. The Fe(3)-Fe(12) bond length is 2.46 Å. The Fe(3)-Fe(17) bond length is 2.57 Å. The Fe(3)-Fe(5) bond length is 2.50 Å. The Fe(3)-Fe(7) bond length is 2.63 Å. The Fe(3)-Fe(9) bond length is 2.46 Å. The Fe(3)-C(2) bond length is 1.91 Å. In the fourth Fe site, Fe(4) is bonded to three equivalent Tm(2), one Fe(10), one Fe(12), one Fe(13), one Fe(18), one Fe(2), one Fe(6), one Fe(8), and two equivalent Fe(16) atoms to form FeTm3Fe9 cuboctahedra that share  a cornercorner with one Fe(10)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(12)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(5)Tm3Fe9 cuboctahedra, corners with two equivalent Fe(18)Tm2Fe10 cuboctahedra, corners with two equivalent Fe(6)Tm3Fe9 cuboctahedra, corners with three equivalent Fe(11)Tm2Fe10 cuboctahedra, corners with three equivalent Fe(4)Tm3Fe9 cuboctahedra, corners with two equivalent C(1)Tm2Fe4 octahedra,  an edgeedge with one Fe(10)Tm2Fe10 cuboctahedra,  an edgeedge with one Fe(11)Tm2Fe10 cuboctahedra,  an edgeedge with one Fe(12)Tm2Fe10 cuboctahedra,  an edgeedge with one Fe(18)Tm2Fe10 cuboctahedra,  an edgeedge with one Fe(4)Tm3Fe9 cuboctahedra, edges with two equivalent Fe(6)Tm3Fe9 cuboctahedra,  a faceface with one Fe(10)Tm2Fe10 cuboctahedra,  a faceface with one Fe(11)Tm2Fe10 cuboctahedra,  a faceface with one Fe(12)Tm2Fe10 cuboctahedra,  a faceface with one Fe(4)Tm3Fe9 cuboctahedra, faces with three equivalent Fe(18)Tm2Fe10 cuboctahedra, faces with three equivalent Fe(6)Tm3Fe9 cuboctahedra, and  a faceface with one C(1)Tm2Fe4 octahedra. The corner-sharing octahedral tilt angles range from 66-70°. The Fe(4)-Fe(10) bond length is 2.47 Å. The Fe(4)-Fe(12) bond length is 2.45 Å. The Fe(4)-Fe(13) bond length is 2.56 Å. The Fe(4)-Fe(18) bond length is 2.56 Å. The Fe(4)-Fe(6) bond length is 2.48 Å. The Fe(4)-Fe(8) bond length is 2.65 Å. There is one shorter (2.58 Å) and one longer (2.61 Å) Fe(4)-Fe(16) bond length. In the fifth Fe site, Fe(5) is bonded to three equivalent Tm(1), one Fe(1), one Fe(11), one Fe(13), one Fe(15), one Fe(3), one Fe(7), one Fe(9), and two equivalent Fe(17) atoms to form FeTm3Fe9 cuboctahedra that share  a cornercorner with one Fe(11)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(9)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(4)Tm3Fe9 cuboctahedra,  a cornercorner with one Fe(6)Tm3Fe9 cuboctahedra, corners with three equivalent Fe(12)Tm2Fe10 cuboctahedra, corners with three equivalent Fe(5)Tm3Fe9 cuboctahedra, corners with two equivalent C(1)Tm2Fe4 octahedra, corners with two equivalent C(2)Tm2Fe4 octahedra,  an edgeedge with one Fe(11)Tm2Fe10 cuboctahedra,  an edgeedge with one Fe(12)Tm2Fe10 cuboctahedra,  an edgeedge with one Fe(9)Tm2Fe10 cuboctahedra,  an edgeedge with one Fe(5)Tm3Fe9 cuboctahedra,  a faceface with one Fe(11)Tm2Fe10 cuboctahedra,  a faceface with one Fe(12)Tm2Fe10 cuboctahedra,  a faceface with one Fe(18)Tm2Fe10 cuboctahedra,  a faceface with one Fe(9)Tm2Fe10 cuboctahedra,  a faceface with one Fe(5)Tm3Fe9 cuboctahedra,  a faceface with one C(1)Tm2Fe4 octahedra, and  a faceface with one C(2)Tm2Fe4 octahedra. The corner-sharing octahedral tilt angles range from 63-69°. The Fe(5)-Fe(11) bond length is 2.46 Å. The Fe(5)-Fe(13) bond length is 2.57 Å. The Fe(5)-Fe(15) bond length is 2.57 Å. The Fe(5)-Fe(7) bond length is 2.67 Å. The Fe(5)-Fe(9) bond length is 2.45 Å. There is one shorter (2.58 Å) and one longer (2.60 Å) Fe(5)-Fe(17) bond length. In the sixth Fe site, Fe(6) is bonded to three equivalent Tm(2), one Fe(10), one Fe(11), one Fe(14), one Fe(16), one Fe(2), one Fe(4), one Fe(8), and two equivalent Fe(18) atoms to form FeTm3Fe9 cuboctahedra that share  a cornercorner with one Fe(10)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(11)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(5)Tm3Fe9 cuboctahedra, corners with two equivalent Fe(18)Tm2Fe10 cuboctahedra, corners with two equivalent Fe(4)Tm3Fe9 cuboctahedra, corners with three equivalent Fe(12)Tm2Fe10 cuboctahedra, corners with three equivalent Fe(6)Tm3Fe9 cuboctahedra, corners with two equivalent C(1)Tm2Fe4 octahedra,  an edgeedge with one Fe(10)Tm2Fe10 cuboctahedra,  an edgeedge with one Fe(11)Tm2Fe10 cuboctahedra,  an edgeedge with one Fe(12)Tm2Fe10 cuboctahedra,  an edgeedge with one Fe(6)Tm3Fe9 cuboctahedra, edges with two equivalent Fe(4)Tm3Fe9 cuboctahedra,  a faceface with one Fe(10)Tm2Fe10 cuboctahedra,  a faceface with one Fe(11)Tm2Fe10 cuboctahedra,  a faceface with one Fe(12)Tm2Fe10 cuboctahedra,  a faceface with one Fe(6)Tm3Fe9 cuboctahedra, faces with three equivalent Fe(18)Tm2Fe10 cuboctahedra, faces with three equivalent Fe(4)Tm3Fe9 cuboctahedra, and  a faceface with one C(1)Tm2Fe4 octahedra. The corner-sharing octahedral tilt angles range from 65-69°. The Fe(6)-Fe(10) bond length is 2.46 Å. The Fe(6)-Fe(11) bond length is 2.45 Å. The Fe(6)-Fe(14) bond length is 2.56 Å. The Fe(6)-Fe(16) bond length is 2.55 Å. The Fe(6)-Fe(8) bond length is 2.66 Å. There is one shorter (2.58 Å) and one longer (2.59 Å) Fe(6)-Fe(18) bond length. In the seventh Fe site, Fe(7) is bonded in a 14-coordinate geometry to one Tm(1), one Fe(11), one Fe(12), one Fe(13), one Fe(14), one Fe(15), one Fe(16), one Fe(17), one Fe(18), one Fe(2), one Fe(3), one Fe(5), one Fe(8), and one Fe(9) atom. The Fe(7)-Fe(11) bond length is 2.61 Å. The Fe(7)-Fe(12) bond length is 2.62 Å. The Fe(7)-Fe(13) bond length is 2.73 Å. The Fe(7)-Fe(14) bond length is 2.71 Å. The Fe(7)-Fe(15) bond length is 2.72 Å. The Fe(7)-Fe(16) bond length is 2.78 Å. The Fe(7)-Fe(17) bond length is 2.75 Å. The Fe(7)-Fe(18) bond length is 2.77 Å. The Fe(7)-Fe(8) bond length is 2.39 Å. The Fe(7)-Fe(9) bond length is 2.62 Å. In the eighth Fe site, Fe(8) is bonded in a 14-coordinate geometry to one Tm(2), one Fe(1), one Fe(10), one Fe(11), one Fe(12), one Fe(13), one Fe(14), one Fe(15), one Fe(16), one Fe(17), one Fe(18), one Fe(4), one Fe(6), and one Fe(7) atom. The Fe(8)-Fe(10) bond length is 2.59 Å. The Fe(8)-Fe(11) bond length is 2.61 Å. The Fe(8)-Fe(12) bond length is 2.63 Å. The Fe(8)-Fe(13) bond length is 2.72 Å. The Fe(8)-Fe(14) bond length is 2.71 Å. The Fe(8)-Fe(15) bond length is 2.73 Å. The Fe(8)-Fe(16) bond length is 2.76 Å. The Fe(8)-Fe(17) bond length is 2.76 Å. The Fe(8)-Fe(18) bond length is 2.74 Å. In the ninth Fe site, Fe(9) is bonded to two equivalent Tm(1), two equivalent Fe(15), two equivalent Fe(17), two equivalent Fe(3), two equivalent Fe(5), and two equivalent Fe(7) atoms to form FeTm2Fe10 cuboctahedra that share corners with two equivalent Fe(11)Tm2Fe10 cuboctahedra, corners with two equivalent Fe(12)Tm2Fe10 cuboctahedra, corners with two equivalent Fe(18)Tm2Fe10 cuboctahedra, corners with two equivalent Fe(5)Tm3Fe9 cuboctahedra, corners with two equivalent C(1)Tm2Fe4 octahedra, edges with two equivalent Fe(5)Tm3Fe9 cuboctahedra, faces with two equivalent Fe(11)Tm2Fe10 cuboctahedra, faces with two equivalent Fe(12)Tm2Fe10 cuboctahedra, faces with two equivalent Fe(5)Tm3Fe9 cuboctahedra, and faces with two equivalent C(2)Tm2Fe4 octahedra. The corner-sharing octahedral tilt angles are 44°. Both Fe(9)-Fe(15) bond lengths are 2.43 Å. Both Fe(9)-Fe(17) bond lengths are 2.44 Å. In the tenth Fe site, Fe(10) is bonded to two equivalent Tm(2), two equivalent Fe(16), two equivalent Fe(18), two equivalent Fe(4), two equivalent Fe(6), and two equivalent Fe(8) atoms to form FeTm2Fe10 cuboctahedra that share corners with two equivalent Fe(11)Tm2Fe10 cuboctahedra, corners with two equivalent Fe(12)Tm2Fe10 cuboctahedra, corners with two equivalent Fe(4)Tm3Fe9 cuboctahedra, corners with two equivalent Fe(6)Tm3Fe9 cuboctahedra, corners with two equivalent C(1)Tm2Fe4 octahedra, edges with two equivalent Fe(18)Tm2Fe10 cuboctahedra, edges with two equivalent Fe(4)Tm3Fe9 cuboctahedra, edges with two equivalent Fe(6)Tm3Fe9 cuboctahedra, faces with two equivalent Fe(11)Tm2Fe10 cuboctahedra, faces with two equivalent Fe(12)Tm2Fe10 cuboctahedra, faces with two equivalent Fe(18)Tm2Fe10 cuboctahedra, faces with two equivalent Fe(4)Tm3Fe9 cuboctahedra, and faces with two equivalent Fe(6)Tm3Fe9 cuboctahedra. The corner-sharing octahedral tilt angles are 44°. Both Fe(10)-Fe(16) bond lengths are 2.42 Å. Both Fe(10)-Fe(18) bond lengths are 2.43 Å. In the eleventh Fe site, Fe(11) is bonded to one Tm(1), one Tm(2), one Fe(1), one Fe(13), one Fe(14), one Fe(17), one Fe(18), one Fe(2), one Fe(5), one Fe(6), one Fe(7), and one Fe(8) atom to form distorted FeTm2Fe10 cuboctahedra that share  a cornercorner with one Fe(10)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(18)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(9)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(5)Tm3Fe9 cuboctahedra,  a cornercorner with one Fe(6)Tm3Fe9 cuboctahedra, corners with two equivalent Fe(12)Tm2Fe10 cuboctahedra, corners with three equivalent Fe(4)Tm3Fe9 cuboctahedra,  a cornercorner with one C(2)Tm2Fe4 octahedra,  an edgeedge with one Fe(18)Tm2Fe10 cuboctahedra,  an edgeedge with one Fe(4)Tm3Fe9 cuboctahedra,  an edgeedge with one Fe(5)Tm3Fe9 cuboctahedra,  an edgeedge with one Fe(6)Tm3Fe9 cuboctahedra,  a faceface with one Fe(10)Tm2Fe10 cuboctahedra,  a faceface with one Fe(18)Tm2Fe10 cuboctahedra,  a faceface with one Fe(9)Tm2Fe10 cuboctahedra,  a faceface with one Fe(4)Tm3Fe9 cuboctahedra,  a faceface with one Fe(5)Tm3Fe9 cuboctahedra,  a faceface with one Fe(6)Tm3Fe9 cuboctahedra, faces with two equivalent Fe(12)Tm2Fe10 cuboctahedra, and faces with two equivalent C(1)Tm2Fe4 octahedra. The corner-sharing octahedral tilt angles are 44°. The Fe(11)-Fe(13) bond length is 2.42 Å. The Fe(11)-Fe(14) bond length is 2.41 Å. The Fe(11)-Fe(17) bond length is 2.43 Å. The Fe(11)-Fe(18) bond length is 2.44 Å. In the twelfth Fe site, Fe(12) is bonded to one Tm(1), one Tm(2), one Fe(1), one Fe(13), one Fe(14), one Fe(15), one Fe(16), one Fe(2), one Fe(3), one Fe(4), one Fe(7), and one Fe(8) atom to form distorted FeTm2Fe10 cuboctahedra that share  a cornercorner with one Fe(10)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(9)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(4)Tm3Fe9 cuboctahedra, corners with two equivalent Fe(11)Tm2Fe10 cuboctahedra, corners with two equivalent Fe(18)Tm2Fe10 cuboctahedra, corners with three equivalent Fe(5)Tm3Fe9 cuboctahedra, corners with three equivalent Fe(6)Tm3Fe9 cuboctahedra,  an edgeedge with one Fe(4)Tm3Fe9 cuboctahedra,  an edgeedge with one Fe(5)Tm3Fe9 cuboctahedra,  an edgeedge with one Fe(6)Tm3Fe9 cuboctahedra,  a faceface with one Fe(10)Tm2Fe10 cuboctahedra,  a faceface with one Fe(9)Tm2Fe10 cuboctahedra,  a faceface with one Fe(4)Tm3Fe9 cuboctahedra,  a faceface with one Fe(5)Tm3Fe9 cuboctahedra,  a faceface with one Fe(6)Tm3Fe9 cuboctahedra, faces with two equivalent Fe(11)Tm2Fe10 cuboctahedra, faces with two equivalent Fe(18)Tm2Fe10 cuboctahedra,  a faceface with one C(2)Tm2Fe4 octahedra, and faces with two equivalent C(1)Tm2Fe4 octahedra. The Fe(12)-Fe(13) bond length is 2.43 Å. The Fe(12)-Fe(14) bond length is 2.40 Å. The Fe(12)-Fe(15) bond length is 2.43 Å. The Fe(12)-Fe(16) bond length is 2.43 Å. In the thirteenth Fe site, Fe(13) is bonded in a single-bond geometry to one Fe(11), one Fe(12), one Fe(18), one Fe(4), one Fe(5), one Fe(7), one Fe(8), and one C(1) atom. The Fe(13)-Fe(18) bond length is 2.47 Å. The Fe(13)-C(1) bond length is 1.85 Å. In the fourteenth Fe site, Fe(14) is bonded in a single-bond geometry to one Fe(11), one Fe(12), one Fe(16), one Fe(17), one Fe(6), one Fe(7), one Fe(8), and one C(1) atom. The Fe(14)-Fe(16) bond length is 2.46 Å. The Fe(14)-Fe(17) bond length is 2.47 Å. The Fe(14)-C(1) bond length is 1.85 Å. In the fifteenth Fe site, Fe(15) is bonded in a single-bond geometry to one Fe(12), one Fe(17), one Fe(5), one Fe(7), one Fe(8), one Fe(9), and one C(2) atom. The Fe(15)-Fe(17) bond length is 2.46 Å. The Fe(15)-C(2) bond length is 1.85 Å. In the sixteenth Fe site, Fe(16) is bonded in a 12-coordinate geometry to two equivalent Tm(2), one Fe(10), one Fe(12), one Fe(14), one Fe(18), one Fe(2), one Fe(6), one Fe(7), one Fe(8), and two equivalent Fe(4) atoms. The Fe(16)-Fe(18) bond length is 2.52 Å. In the seventeenth Fe site, Fe(17) is bonded in a 12-coordinate geometry to two equivalent Tm(1), one Fe(1), one Fe(11), one Fe(14), one Fe(15), one Fe(3), one Fe(7), one Fe(8), one Fe(9), and two equivalent Fe(5) atoms. In the eighteenth Fe site, Fe(18) is bonded to two equivalent Tm(2), one Fe(10), one Fe(11), one Fe(13), one Fe(16), one Fe(2), one Fe(4), one Fe(7), one Fe(8), and two equivalent Fe(6) atoms to form distorted FeTm2Fe10 cuboctahedra that share  a cornercorner with one Fe(11)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(18)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(9)Tm2Fe10 cuboctahedra, corners with two equivalent Fe(12)Tm2Fe10 cuboctahedra, corners with two equivalent Fe(4)Tm3Fe9 cuboctahedra, corners with two equivalent Fe(6)Tm3Fe9 cuboctahedra, corners with two equivalent C(1)Tm2Fe4 octahedra,  an edgeedge with one Fe(10)Tm2Fe10 cuboctahedra,  an edgeedge with one Fe(11)Tm2Fe10 cuboctahedra,  an edgeedge with one Fe(4)Tm3Fe9 cuboctahedra,  an edgeedge with one C(1)Tm2Fe4 octahedra,  a faceface with one Fe(10)Tm2Fe10 cuboctahedra,  a faceface with one Fe(11)Tm2Fe10 cuboctahedra,  a faceface with one Fe(18)Tm2Fe10 cuboctahedra,  a faceface with one Fe(5)Tm3Fe9 cuboctahedra, faces with two equivalent Fe(12)Tm2Fe10 cuboctahedra, faces with three equivalent Fe(4)Tm3Fe9 cuboctahedra, and faces with three equivalent Fe(6)Tm3Fe9 cuboctahedra. The corner-sharing octahedral tilt angles range from 25-30°. There are two inequivalent C sites. In the first C site, C(1) is bonded to one Tm(1), one Tm(2), one Fe(1), one Fe(13), one Fe(14), and one Fe(2) atom to form CTm2Fe4 octahedra that share  a cornercorner with one Fe(10)Tm2Fe10 cuboctahedra,  a cornercorner with one Fe(9)Tm2Fe10 cuboctahedra, corners with two equivalent Fe(18)Tm2Fe10 cuboctahedra, corners with two equivalent Fe(4)Tm3Fe9 cuboctahedra, corners with two equivalent Fe(5)Tm3Fe9 cuboctahedra, corners with two equivalent Fe(6)Tm3Fe9 cuboctahedra,  a cornercorner with one C(2)Tm2Fe4 octahedra,  an edgeedge with one Fe(18)Tm2Fe10 cuboctahedra,  a faceface with one Fe(4)Tm3Fe9 cuboctahedra,  a faceface with one Fe(5)Tm3Fe9 cuboctahedra,  a faceface with one Fe(6)Tm3Fe9 cuboctahedra, faces with two equivalent Fe(11)Tm2Fe10 cuboctahedra, and faces with two equivalent Fe(12)Tm2Fe10 cuboctahedra. The corner-sharing octahedral tilt angles are 62°. In the second C site, C(2) is bonded to two equivalent Tm(1), two equivalent Fe(15), and two equivalent Fe(3) atoms to form CTm2Fe4 octahedra that share corners with two equivalent Fe(11)Tm2Fe10 cuboctahedra, corners with four equivalent Fe(5)Tm3Fe9 cuboctahedra, corners with two equivalent C(1)Tm2Fe4 octahedra, faces with two equivalent Fe(12)Tm2Fe10 cuboctahedra, faces with two equivalent Fe(9)Tm2Fe10 cuboctahedra, and faces with two equivalent Fe(5)Tm3Fe9 cuboctahedra. The corner-sharing octahedral tilt angles are 62°.