Zr(CoZn10)2 crystallizes in the cubic Fd-3m space group. Zr(1) is bonded in a 16-coordinate geometry to four equivalent Zn(3) and twelve equivalent Zn(1) atoms. Co(1) is bonded to six equivalent Zn(1) and six equivalent Zn(2) atoms to form CoZn12 cuboctahedra that share corners with six equivalent Co(1)Zn12 cuboctahedra, edges with eighteen equivalent Zn(1)ZrZn10Co cuboctahedra, and faces with six equivalent Zn(1)ZrZn10Co cuboctahedra. There are three inequivalent Zn sites. In the first Zn site, Zn(2) is bonded in a distorted linear geometry to two equivalent Co(1), four equivalent Zn(2), and six equivalent Zn(1) atoms. In the second Zn site, Zn(1) is bonded to one Zr(1), one Co(1), two equivalent Zn(3), three equivalent Zn(2), and five equivalent Zn(1) atoms to form distorted ZnZrZn10Co cuboctahedra that share corners with fifteen equivalent Zn(1)ZrZn10Co cuboctahedra, edges with two equivalent Zn(1)ZrZn10Co cuboctahedra, edges with three equivalent Co(1)Zn12 cuboctahedra,  a faceface with one Co(1)Zn12 cuboctahedra, and faces with fifteen equivalent Zn(1)ZrZn10Co cuboctahedra. In the third Zn site, Zn(3) is bonded in a 14-coordinate geometry to two equivalent Zr(1) and twelve equivalent Zn(1) atoms.
Zr(CoZn10)2 crystallizes in the cubic Fd-3m space group. Zr(1) is bonded in a 16-coordinate geometry to four equivalent Zn(3) and twelve equivalent Zn(1) atoms. All Zr(1)-Zn(3) bond lengths are 3.01 Å. All Zr(1)-Zn(1) bond lengths are 3.06 Å. Co(1) is bonded to six equivalent Zn(1) and six equivalent Zn(2) atoms to form CoZn12 cuboctahedra that share corners with six equivalent Co(1)Zn12 cuboctahedra, edges with eighteen equivalent Zn(1)ZrZn10Co cuboctahedra, and faces with six equivalent Zn(1)ZrZn10Co cuboctahedra. All Co(1)-Zn(1) bond lengths are 2.72 Å. All Co(1)-Zn(2) bond lengths are 2.47 Å. There are three inequivalent Zn sites. In the first Zn site, Zn(2) is bonded in a distorted linear geometry to two equivalent Co(1), four equivalent Zn(2), and six equivalent Zn(1) atoms. All Zn(2)-Zn(2) bond lengths are 2.69 Å. There are two shorter (2.62 Å) and four longer (2.75 Å) Zn(2)-Zn(1) bond lengths. In the second Zn site, Zn(1) is bonded to one Zr(1), one Co(1), two equivalent Zn(3), three equivalent Zn(2), and five equivalent Zn(1) atoms to form distorted ZnZrZn10Co cuboctahedra that share corners with fifteen equivalent Zn(1)ZrZn10Co cuboctahedra, edges with two equivalent Zn(1)ZrZn10Co cuboctahedra, edges with three equivalent Co(1)Zn12 cuboctahedra,  a faceface with one Co(1)Zn12 cuboctahedra, and faces with fifteen equivalent Zn(1)ZrZn10Co cuboctahedra. Both Zn(1)-Zn(3) bond lengths are 2.96 Å. There are a spread of Zn(1)-Zn(1) bond distances ranging from 2.57-2.83 Å. In the third Zn site, Zn(3) is bonded in a 14-coordinate geometry to two equivalent Zr(1) and twelve equivalent Zn(1) atoms.