Yb2Mn2Co15 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 18-coordinate geometry to two equivalent Co(3), two equivalent Co(4), two equivalent Co(5), four equivalent Co(7), and eight equivalent Co(6) atoms. In the second Yb site, Yb(2) is bonded in a 20-coordinate geometry to two equivalent Mn(1), two equivalent Co(2), two equivalent Co(3), two equivalent Co(4), two equivalent Co(5), two equivalent Co(7), four equivalent Co(1), and four equivalent Co(6) atoms. Mn(1) is bonded in a 14-coordinate geometry to one Yb(2), one Mn(1), one Co(2), one Co(7), two equivalent Co(1), two equivalent Co(3), two equivalent Co(4), two equivalent Co(5), and two equivalent Co(6) atoms. There are seven inequivalent Co sites. In the first Co site, Co(6) is bonded to one Yb(2), two equivalent Yb(1), one Mn(1), one Co(1), one Co(2), one Co(3), one Co(5), one Co(6), one Co(7), and two equivalent Co(4) atoms to form distorted CoYb3MnCo8 cuboctahedra that share  a cornercorner with one Co(2)Yb2Mn2Co8 cuboctahedra, corners with two equivalent Co(4)Yb2Mn2Co8 cuboctahedra, corners with three equivalent Co(3)Yb2Mn2Co8 cuboctahedra, corners with three equivalent Co(5)Yb2Mn2Co8 cuboctahedra, corners with three equivalent Co(7)Yb3MnCo8 cuboctahedra, corners with four equivalent Co(1)Yb2Mn2Co8 cuboctahedra, corners with seven equivalent Co(6)Yb3MnCo8 cuboctahedra,  an edgeedge with one Co(2)Yb2Mn2Co8 cuboctahedra,  an edgeedge with one Co(3)Yb2Mn2Co8 cuboctahedra,  an edgeedge with one Co(5)Yb2Mn2Co8 cuboctahedra, edges with two equivalent Co(1)Yb2Mn2Co8 cuboctahedra, edges with two equivalent Co(7)Yb3MnCo8 cuboctahedra, edges with three equivalent Co(6)Yb3MnCo8 cuboctahedra,  a faceface with one Co(1)Yb2Mn2Co8 cuboctahedra,  a faceface with one Co(2)Yb2Mn2Co8 cuboctahedra, faces with three equivalent Co(3)Yb2Mn2Co8 cuboctahedra, faces with three equivalent Co(5)Yb2Mn2Co8 cuboctahedra, faces with three equivalent Co(7)Yb3MnCo8 cuboctahedra, faces with four equivalent Co(4)Yb2Mn2Co8 cuboctahedra, and faces with five equivalent Co(6)Yb3MnCo8 cuboctahedra. In the second Co site, Co(7) is bonded to one Yb(2), two equivalent Yb(1), one Mn(1), two equivalent Co(1), two equivalent Co(3), two equivalent Co(5), and two equivalent Co(6) atoms to form distorted CoYb3MnCo8 cuboctahedra that share corners with two equivalent Co(1)Yb2Mn2Co8 cuboctahedra, corners with two equivalent Co(3)Yb2Mn2Co8 cuboctahedra, corners with two equivalent Co(5)Yb2Mn2Co8 cuboctahedra, corners with three equivalent Co(2)Yb2Mn2Co8 cuboctahedra, corners with four equivalent Co(4)Yb2Mn2Co8 cuboctahedra, corners with four equivalent Co(7)Yb3MnCo8 cuboctahedra, corners with six equivalent Co(6)Yb3MnCo8 cuboctahedra,  an edgeedge with one Co(2)Yb2Mn2Co8 cuboctahedra,  an edgeedge with one Co(7)Yb3MnCo8 cuboctahedra, edges with two equivalent Co(1)Yb2Mn2Co8 cuboctahedra, edges with two equivalent Co(4)Yb2Mn2Co8 cuboctahedra, edges with four equivalent Co(6)Yb3MnCo8 cuboctahedra, faces with two equivalent Co(1)Yb2Mn2Co8 cuboctahedra, faces with two equivalent Co(4)Yb2Mn2Co8 cuboctahedra, faces with two equivalent Co(7)Yb3MnCo8 cuboctahedra, faces with four equivalent Co(3)Yb2Mn2Co8 cuboctahedra, faces with four equivalent Co(5)Yb2Mn2Co8 cuboctahedra, and faces with six equivalent Co(6)Yb3MnCo8 cuboctahedra. In the third Co site, Co(1) is bonded to two equivalent Yb(2), two equivalent Mn(1), two equivalent Co(3), two equivalent Co(5), two equivalent Co(6), and two equivalent Co(7) atoms to form distorted CoYb2Mn2Co8 cuboctahedra that share corners with two equivalent Co(1)Yb2Mn2Co8 cuboctahedra, corners with two equivalent Co(2)Yb2Mn2Co8 cuboctahedra, corners with two equivalent Co(3)Yb2Mn2Co8 cuboctahedra, corners with two equivalent Co(5)Yb2Mn2Co8 cuboctahedra, corners with two equivalent Co(7)Yb3MnCo8 cuboctahedra, corners with four equivalent Co(4)Yb2Mn2Co8 cuboctahedra, corners with eight equivalent Co(6)Yb3MnCo8 cuboctahedra, edges with two equivalent Co(4)Yb2Mn2Co8 cuboctahedra, edges with two equivalent Co(5)Yb2Mn2Co8 cuboctahedra, edges with two equivalent Co(7)Yb3MnCo8 cuboctahedra, edges with four equivalent Co(6)Yb3MnCo8 cuboctahedra, faces with two equivalent Co(2)Yb2Mn2Co8 cuboctahedra, faces with two equivalent Co(4)Yb2Mn2Co8 cuboctahedra, faces with two equivalent Co(5)Yb2Mn2Co8 cuboctahedra, faces with two equivalent Co(6)Yb3MnCo8 cuboctahedra, faces with two equivalent Co(7)Yb3MnCo8 cuboctahedra, faces with four equivalent Co(1)Yb2Mn2Co8 cuboctahedra, and faces with four equivalent Co(3)Yb2Mn2Co8 cuboctahedra. In the fourth Co site, Co(2) is bonded to two equivalent Yb(2), two equivalent Mn(1), four equivalent Co(4), and four equivalent Co(6) atoms to form distorted CoYb2Mn2Co8 cuboctahedra that share corners with four equivalent Co(1)Yb2Mn2Co8 cuboctahedra, corners with four equivalent Co(3)Yb2Mn2Co8 cuboctahedra, corners with four equivalent Co(5)Yb2Mn2Co8 cuboctahedra, corners with four equivalent Co(6)Yb3MnCo8 cuboctahedra, corners with six equivalent Co(7)Yb3MnCo8 cuboctahedra, edges with two equivalent Co(7)Yb3MnCo8 cuboctahedra, edges with four equivalent Co(3)Yb2Mn2Co8 cuboctahedra, edges with four equivalent Co(6)Yb3MnCo8 cuboctahedra, faces with two equivalent Co(2)Yb2Mn2Co8 cuboctahedra, faces with four equivalent Co(1)Yb2Mn2Co8 cuboctahedra, faces with four equivalent Co(4)Yb2Mn2Co8 cuboctahedra, faces with four equivalent Co(5)Yb2Mn2Co8 cuboctahedra, and faces with four equivalent Co(6)Yb3MnCo8 cuboctahedra. In the fifth Co site, Co(3) is bonded to one Yb(1), one Yb(2), two equivalent Mn(1), one Co(3), one Co(5), two equivalent Co(1), two equivalent Co(6), and two equivalent Co(7) atoms to form distorted CoYb2Mn2Co8 cuboctahedra that share corners with two equivalent Co(1)Yb2Mn2Co8 cuboctahedra, corners with two equivalent Co(2)Yb2Mn2Co8 cuboctahedra, corners with two equivalent Co(7)Yb3MnCo8 cuboctahedra, corners with three equivalent Co(3)Yb2Mn2Co8 cuboctahedra, corners with four equivalent Co(4)Yb2Mn2Co8 cuboctahedra, corners with five equivalent Co(5)Yb2Mn2Co8 cuboctahedra, corners with six equivalent Co(6)Yb3MnCo8 cuboctahedra,  an edgeedge with one Co(4)Yb2Mn2Co8 cuboctahedra, edges with two equivalent Co(2)Yb2Mn2Co8 cuboctahedra, edges with two equivalent Co(6)Yb3MnCo8 cuboctahedra,  a faceface with one Co(3)Yb2Mn2Co8 cuboctahedra, faces with two equivalent Co(4)Yb2Mn2Co8 cuboctahedra, faces with four equivalent Co(1)Yb2Mn2Co8 cuboctahedra, faces with four equivalent Co(5)Yb2Mn2Co8 cuboctahedra, faces with four equivalent Co(7)Yb3MnCo8 cuboctahedra, and faces with six equivalent Co(6)Yb3MnCo8 cuboctahedra. In the sixth Co site, Co(4) is bonded to one Yb(1), one Yb(2), two equivalent Mn(1), one Co(4), one Co(5), two equivalent Co(2), and four equivalent Co(6) atoms to form distorted CoYb2Mn2Co8 cuboctahedra that share corners with three equivalent Co(4)Yb2Mn2Co8 cuboctahedra, corners with four equivalent Co(1)Yb2Mn2Co8 cuboctahedra, corners with four equivalent Co(3)Yb2Mn2Co8 cuboctahedra, corners with four equivalent Co(6)Yb3MnCo8 cuboctahedra, corners with four equivalent Co(7)Yb3MnCo8 cuboctahedra, corners with five equivalent Co(5)Yb2Mn2Co8 cuboctahedra,  an edgeedge with one Co(3)Yb2Mn2Co8 cuboctahedra, edges with two equivalent Co(1)Yb2Mn2Co8 cuboctahedra, edges with two equivalent Co(7)Yb3MnCo8 cuboctahedra, faces with two equivalent Co(1)Yb2Mn2Co8 cuboctahedra, faces with two equivalent Co(2)Yb2Mn2Co8 cuboctahedra, faces with two equivalent Co(3)Yb2Mn2Co8 cuboctahedra, faces with two equivalent Co(5)Yb2Mn2Co8 cuboctahedra, faces with two equivalent Co(7)Yb3MnCo8 cuboctahedra, faces with three equivalent Co(4)Yb2Mn2Co8 cuboctahedra, and faces with eight equivalent Co(6)Yb3MnCo8 cuboctahedra. In the seventh Co site, Co(5) is bonded to one Yb(1), one Yb(2), two equivalent Mn(1), one Co(3), one Co(4), two equivalent Co(1), two equivalent Co(6), and two equivalent Co(7) atoms to form distorted CoYb2Mn2Co8 cuboctahedra that share corners with two equivalent Co(1)Yb2Mn2Co8 cuboctahedra, corners with two equivalent Co(2)Yb2Mn2Co8 cuboctahedra, corners with two equivalent Co(5)Yb2Mn2Co8 cuboctahedra, corners with two equivalent Co(7)Yb3MnCo8 cuboctahedra, corners with five equivalent Co(3)Yb2Mn2Co8 cuboctahedra, corners with five equivalent Co(4)Yb2Mn2Co8 cuboctahedra, corners with six equivalent Co(6)Yb3MnCo8 cuboctahedra,  an edgeedge with one Co(5)Yb2Mn2Co8 cuboctahedra, edges with two equivalent Co(1)Yb2Mn2Co8 cuboctahedra, edges with two equivalent Co(6)Yb3MnCo8 cuboctahedra,  a faceface with one Co(5)Yb2Mn2Co8 cuboctahedra, faces with two equivalent Co(1)Yb2Mn2Co8 cuboctahedra, faces with two equivalent Co(2)Yb2Mn2Co8 cuboctahedra, faces with two equivalent Co(4)Yb2Mn2Co8 cuboctahedra, faces with four equivalent Co(3)Yb2Mn2Co8 cuboctahedra, faces with four equivalent Co(7)Yb3MnCo8 cuboctahedra, and faces with six equivalent Co(6)Yb3MnCo8 cuboctahedra.
Yb2Mn2Co15 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 18-coordinate geometry to two equivalent Co(3), two equivalent Co(4), two equivalent Co(5), four equivalent Co(7), and eight equivalent Co(6) atoms. Both Yb(1)-Co(3) bond lengths are 2.92 Å. Both Yb(1)-Co(4) bond lengths are 2.93 Å. Both Yb(1)-Co(5) bond lengths are 2.92 Å. There are two shorter (2.98 Å) and two longer (3.23 Å) Yb(1)-Co(7) bond lengths. There are four shorter (2.99 Å) and four longer (3.22 Å) Yb(1)-Co(6) bond lengths. In the second Yb site, Yb(2) is bonded in a 20-coordinate geometry to two equivalent Mn(1), two equivalent Co(2), two equivalent Co(3), two equivalent Co(4), two equivalent Co(5), two equivalent Co(7), four equivalent Co(1), and four equivalent Co(6) atoms. Both Yb(2)-Mn(1) bond lengths are 2.80 Å. Both Yb(2)-Co(2) bond lengths are 3.14 Å. Both Yb(2)-Co(3) bond lengths are 2.99 Å. Both Yb(2)-Co(4) bond lengths are 2.99 Å. Both Yb(2)-Co(5) bond lengths are 2.99 Å. Both Yb(2)-Co(7) bond lengths are 3.06 Å. All Yb(2)-Co(1) bond lengths are 3.14 Å. All Yb(2)-Co(6) bond lengths are 3.07 Å. Mn(1) is bonded in a 14-coordinate geometry to one Yb(2), one Mn(1), one Co(2), one Co(7), two equivalent Co(1), two equivalent Co(3), two equivalent Co(4), two equivalent Co(5), and two equivalent Co(6) atoms. The Mn(1)-Mn(1) bond length is 2.55 Å. The Mn(1)-Co(2) bond length is 2.51 Å. The Mn(1)-Co(7) bond length is 2.62 Å. Both Mn(1)-Co(1) bond lengths are 2.51 Å. Both Mn(1)-Co(3) bond lengths are 2.72 Å. Both Mn(1)-Co(4) bond lengths are 2.72 Å. Both Mn(1)-Co(5) bond lengths are 2.72 Å. Both Mn(1)-Co(6) bond lengths are 2.62 Å. There are seven inequivalent Co sites. In the first Co site, Co(6) is bonded to one Yb(2), two equivalent Yb(1), one Mn(1), one Co(1), one Co(2), one Co(3), one Co(5), one Co(6), one Co(7), and two equivalent Co(4) atoms to form distorted CoYb3MnCo8 cuboctahedra that share  a cornercorner with one Co(2)Yb2Mn2Co8 cuboctahedra, corners with two equivalent Co(4)Yb2Mn2Co8 cuboctahedra, corners with three equivalent Co(3)Yb2Mn2Co8 cuboctahedra, corners with three equivalent Co(5)Yb2Mn2Co8 cuboctahedra, corners with three equivalent Co(7)Yb3MnCo8 cuboctahedra, corners with four equivalent Co(1)Yb2Mn2Co8 cuboctahedra, corners with seven equivalent Co(6)Yb3MnCo8 cuboctahedra,  an edgeedge with one Co(2)Yb2Mn2Co8 cuboctahedra,  an edgeedge with one Co(3)Yb2Mn2Co8 cuboctahedra,  an edgeedge with one Co(5)Yb2Mn2Co8 cuboctahedra, edges with two equivalent Co(1)Yb2Mn2Co8 cuboctahedra, edges with two equivalent Co(7)Yb3MnCo8 cuboctahedra, edges with three equivalent Co(6)Yb3MnCo8 cuboctahedra,  a faceface with one Co(1)Yb2Mn2Co8 cuboctahedra,  a faceface with one Co(2)Yb2Mn2Co8 cuboctahedra, faces with three equivalent Co(3)Yb2Mn2Co8 cuboctahedra, faces with three equivalent Co(5)Yb2Mn2Co8 cuboctahedra, faces with three equivalent Co(7)Yb3MnCo8 cuboctahedra, faces with four equivalent Co(4)Yb2Mn2Co8 cuboctahedra, and faces with five equivalent Co(6)Yb3MnCo8 cuboctahedra. The Co(6)-Co(1) bond length is 2.42 Å. The Co(6)-Co(2) bond length is 2.42 Å. The Co(6)-Co(3) bond length is 2.54 Å. The Co(6)-Co(5) bond length is 2.53 Å. The Co(6)-Co(6) bond length is 2.36 Å. The Co(6)-Co(7) bond length is 2.37 Å. There is one shorter (2.53 Å) and one longer (2.54 Å) Co(6)-Co(4) bond length. In the second Co site, Co(7) is bonded to one Yb(2), two equivalent Yb(1), one Mn(1), two equivalent Co(1), two equivalent Co(3), two equivalent Co(5), and two equivalent Co(6) atoms to form distorted CoYb3MnCo8 cuboctahedra that share corners with two equivalent Co(1)Yb2Mn2Co8 cuboctahedra, corners with two equivalent Co(3)Yb2Mn2Co8 cuboctahedra, corners with two equivalent Co(5)Yb2Mn2Co8 cuboctahedra, corners with three equivalent Co(2)Yb2Mn2Co8 cuboctahedra, corners with four equivalent Co(4)Yb2Mn2Co8 cuboctahedra, corners with four equivalent Co(7)Yb3MnCo8 cuboctahedra, corners with six equivalent Co(6)Yb3MnCo8 cuboctahedra,  an edgeedge with one Co(2)Yb2Mn2Co8 cuboctahedra,  an edgeedge with one Co(7)Yb3MnCo8 cuboctahedra, edges with two equivalent Co(1)Yb2Mn2Co8 cuboctahedra, edges with two equivalent Co(4)Yb2Mn2Co8 cuboctahedra, edges with four equivalent Co(6)Yb3MnCo8 cuboctahedra, faces with two equivalent Co(1)Yb2Mn2Co8 cuboctahedra, faces with two equivalent Co(4)Yb2Mn2Co8 cuboctahedra, faces with two equivalent Co(7)Yb3MnCo8 cuboctahedra, faces with four equivalent Co(3)Yb2Mn2Co8 cuboctahedra, faces with four equivalent Co(5)Yb2Mn2Co8 cuboctahedra, and faces with six equivalent Co(6)Yb3MnCo8 cuboctahedra. Both Co(7)-Co(1) bond lengths are 2.42 Å. Both Co(7)-Co(3) bond lengths are 2.53 Å. Both Co(7)-Co(5) bond lengths are 2.54 Å. In the third Co site, Co(1) is bonded to two equivalent Yb(2), two equivalent Mn(1), two equivalent Co(3), two equivalent Co(5), two equivalent Co(6), and two equivalent Co(7) atoms to form distorted CoYb2Mn2Co8 cuboctahedra that share corners with two equivalent Co(1)Yb2Mn2Co8 cuboctahedra, corners with two equivalent Co(2)Yb2Mn2Co8 cuboctahedra, corners with two equivalent Co(3)Yb2Mn2Co8 cuboctahedra, corners with two equivalent Co(5)Yb2Mn2Co8 cuboctahedra, corners with two equivalent Co(7)Yb3MnCo8 cuboctahedra, corners with four equivalent Co(4)Yb2Mn2Co8 cuboctahedra, corners with eight equivalent Co(6)Yb3MnCo8 cuboctahedra, edges with two equivalent Co(4)Yb2Mn2Co8 cuboctahedra, edges with two equivalent Co(5)Yb2Mn2Co8 cuboctahedra, edges with two equivalent Co(7)Yb3MnCo8 cuboctahedra, edges with four equivalent Co(6)Yb3MnCo8 cuboctahedra, faces with two equivalent Co(2)Yb2Mn2Co8 cuboctahedra, faces with two equivalent Co(4)Yb2Mn2Co8 cuboctahedra, faces with two equivalent Co(5)Yb2Mn2Co8 cuboctahedra, faces with two equivalent Co(6)Yb3MnCo8 cuboctahedra, faces with two equivalent Co(7)Yb3MnCo8 cuboctahedra, faces with four equivalent Co(1)Yb2Mn2Co8 cuboctahedra, and faces with four equivalent Co(3)Yb2Mn2Co8 cuboctahedra. Both Co(1)-Co(3) bond lengths are 2.41 Å. Both Co(1)-Co(5) bond lengths are 2.40 Å. In the fourth Co site, Co(2) is bonded to two equivalent Yb(2), two equivalent Mn(1), four equivalent Co(4), and four equivalent Co(6) atoms to form distorted CoYb2Mn2Co8 cuboctahedra that share corners with four equivalent Co(1)Yb2Mn2Co8 cuboctahedra, corners with four equivalent Co(3)Yb2Mn2Co8 cuboctahedra, corners with four equivalent Co(5)Yb2Mn2Co8 cuboctahedra, corners with four equivalent Co(6)Yb3MnCo8 cuboctahedra, corners with six equivalent Co(7)Yb3MnCo8 cuboctahedra, edges with two equivalent Co(7)Yb3MnCo8 cuboctahedra, edges with four equivalent Co(3)Yb2Mn2Co8 cuboctahedra, edges with four equivalent Co(6)Yb3MnCo8 cuboctahedra, faces with two equivalent Co(2)Yb2Mn2Co8 cuboctahedra, faces with four equivalent Co(1)Yb2Mn2Co8 cuboctahedra, faces with four equivalent Co(4)Yb2Mn2Co8 cuboctahedra, faces with four equivalent Co(5)Yb2Mn2Co8 cuboctahedra, and faces with four equivalent Co(6)Yb3MnCo8 cuboctahedra. All Co(2)-Co(4) bond lengths are 2.41 Å. In the fifth Co site, Co(3) is bonded to one Yb(1), one Yb(2), two equivalent Mn(1), one Co(3), one Co(5), two equivalent Co(1), two equivalent Co(6), and two equivalent Co(7) atoms to form distorted CoYb2Mn2Co8 cuboctahedra that share corners with two equivalent Co(1)Yb2Mn2Co8 cuboctahedra, corners with two equivalent Co(2)Yb2Mn2Co8 cuboctahedra, corners with two equivalent Co(7)Yb3MnCo8 cuboctahedra, corners with three equivalent Co(3)Yb2Mn2Co8 cuboctahedra, corners with four equivalent Co(4)Yb2Mn2Co8 cuboctahedra, corners with five equivalent Co(5)Yb2Mn2Co8 cuboctahedra, corners with six equivalent Co(6)Yb3MnCo8 cuboctahedra,  an edgeedge with one Co(4)Yb2Mn2Co8 cuboctahedra, edges with two equivalent Co(2)Yb2Mn2Co8 cuboctahedra, edges with two equivalent Co(6)Yb3MnCo8 cuboctahedra,  a faceface with one Co(3)Yb2Mn2Co8 cuboctahedra, faces with two equivalent Co(4)Yb2Mn2Co8 cuboctahedra, faces with four equivalent Co(1)Yb2Mn2Co8 cuboctahedra, faces with four equivalent Co(5)Yb2Mn2Co8 cuboctahedra, faces with four equivalent Co(7)Yb3MnCo8 cuboctahedra, and faces with six equivalent Co(6)Yb3MnCo8 cuboctahedra. The Co(3)-Co(3) bond length is 2.34 Å. The Co(3)-Co(5) bond length is 2.47 Å. In the sixth Co site, Co(4) is bonded to one Yb(1), one Yb(2), two equivalent Mn(1), one Co(4), one Co(5), two equivalent Co(2), and four equivalent Co(6) atoms to form distorted CoYb2Mn2Co8 cuboctahedra that share corners with three equivalent Co(4)Yb2Mn2Co8 cuboctahedra, corners with four equivalent Co(1)Yb2Mn2Co8 cuboctahedra, corners with four equivalent Co(3)Yb2Mn2Co8 cuboctahedra, corners with four equivalent Co(6)Yb3MnCo8 cuboctahedra, corners with four equivalent Co(7)Yb3MnCo8 cuboctahedra, corners with five equivalent Co(5)Yb2Mn2Co8 cuboctahedra,  an edgeedge with one Co(3)Yb2Mn2Co8 cuboctahedra, edges with two equivalent Co(1)Yb2Mn2Co8 cuboctahedra, edges with two equivalent Co(7)Yb3MnCo8 cuboctahedra, faces with two equivalent Co(1)Yb2Mn2Co8 cuboctahedra, faces with two equivalent Co(2)Yb2Mn2Co8 cuboctahedra, faces with two equivalent Co(3)Yb2Mn2Co8 cuboctahedra, faces with two equivalent Co(5)Yb2Mn2Co8 cuboctahedra, faces with two equivalent Co(7)Yb3MnCo8 cuboctahedra, faces with three equivalent Co(4)Yb2Mn2Co8 cuboctahedra, and faces with eight equivalent Co(6)Yb3MnCo8 cuboctahedra. The Co(4)-Co(4) bond length is 2.47 Å. The Co(4)-Co(5) bond length is 2.33 Å. In the seventh Co site, Co(5) is bonded to one Yb(1), one Yb(2), two equivalent Mn(1), one Co(3), one Co(4), two equivalent Co(1), two equivalent Co(6), and two equivalent Co(7) atoms to form distorted CoYb2Mn2Co8 cuboctahedra that share corners with two equivalent Co(1)Yb2Mn2Co8 cuboctahedra, corners with two equivalent Co(2)Yb2Mn2Co8 cuboctahedra, corners with two equivalent Co(5)Yb2Mn2Co8 cuboctahedra, corners with two equivalent Co(7)Yb3MnCo8 cuboctahedra, corners with five equivalent Co(3)Yb2Mn2Co8 cuboctahedra, corners with five equivalent Co(4)Yb2Mn2Co8 cuboctahedra, corners with six equivalent Co(6)Yb3MnCo8 cuboctahedra,  an edgeedge with one Co(5)Yb2Mn2Co8 cuboctahedra, edges with two equivalent Co(1)Yb2Mn2Co8 cuboctahedra, edges with two equivalent Co(6)Yb3MnCo8 cuboctahedra,  a faceface with one Co(5)Yb2Mn2Co8 cuboctahedra, faces with two equivalent Co(1)Yb2Mn2Co8 cuboctahedra, faces with two equivalent Co(2)Yb2Mn2Co8 cuboctahedra, faces with two equivalent Co(4)Yb2Mn2Co8 cuboctahedra, faces with four equivalent Co(3)Yb2Mn2Co8 cuboctahedra, faces with four equivalent Co(7)Yb3MnCo8 cuboctahedra, and faces with six equivalent Co(6)Yb3MnCo8 cuboctahedra.