ThZn11 crystallizes in the orthorhombic Pmmm space group. Th(1) is bonded in a 18-coordinate geometry to two equivalent Zn(1), four equivalent Zn(2), four equivalent Zn(4), and eight equivalent Zn(5) atoms. There are six inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one Th(1), one Zn(1), two equivalent Zn(2), two equivalent Zn(3), two equivalent Zn(6), and four equivalent Zn(5) atoms to form ZnThZn11 cuboctahedra that share corners with five equivalent Zn(1)ThZn11 cuboctahedra, edges with two equivalent Zn(1)ThZn11 cuboctahedra, faces with three equivalent Zn(1)ThZn11 cuboctahedra, and faces with four equivalent Zn(4)Th4Zn8 cuboctahedra. In the second Zn site, Zn(2) is bonded in a 11-coordinate geometry to two equivalent Th(1), one Zn(6), two equivalent Zn(1), two equivalent Zn(4), and four equivalent Zn(5) atoms. In the third Zn site, Zn(3) is bonded in a 8-coordinate geometry to four equivalent Zn(1) and four equivalent Zn(5) atoms. In the fourth Zn site, Zn(4) is bonded to four equivalent Th(1), four equivalent Zn(2), and four equivalent Zn(5) atoms to form ZnTh4Zn8 cuboctahedra that share corners with four equivalent Zn(4)Th4Zn8 cuboctahedra, edges with two equivalent Zn(4)Th4Zn8 cuboctahedra, faces with two equivalent Zn(4)Th4Zn8 cuboctahedra, and faces with eight equivalent Zn(1)ThZn11 cuboctahedra. In the fifth Zn site, Zn(5) is bonded in a 10-coordinate geometry to two equivalent Th(1), one Zn(3), one Zn(4), two equivalent Zn(1), two equivalent Zn(2), and two equivalent Zn(5) atoms. In the sixth Zn site, Zn(6) is bonded in a hexagonal planar geometry to two equivalent Zn(2) and four equivalent Zn(1) atoms.
ThZn11 crystallizes in the orthorhombic Pmmm space group. Th(1) is bonded in a 18-coordinate geometry to two equivalent Zn(1), four equivalent Zn(2), four equivalent Zn(4), and eight equivalent Zn(5) atoms. Both Th(1)-Zn(1) bond lengths are 3.28 Å. All Th(1)-Zn(2) bond lengths are 3.24 Å. All Th(1)-Zn(4) bond lengths are 3.37 Å. All Th(1)-Zn(5) bond lengths are 3.34 Å. There are six inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one Th(1), one Zn(1), two equivalent Zn(2), two equivalent Zn(3), two equivalent Zn(6), and four equivalent Zn(5) atoms to form ZnThZn11 cuboctahedra that share corners with five equivalent Zn(1)ThZn11 cuboctahedra, edges with two equivalent Zn(1)ThZn11 cuboctahedra, faces with three equivalent Zn(1)ThZn11 cuboctahedra, and faces with four equivalent Zn(4)Th4Zn8 cuboctahedra. The Zn(1)-Zn(1) bond length is 2.74 Å. Both Zn(1)-Zn(2) bond lengths are 2.87 Å. Both Zn(1)-Zn(3) bond lengths are 2.58 Å. Both Zn(1)-Zn(6) bond lengths are 2.90 Å. All Zn(1)-Zn(5) bond lengths are 2.73 Å. In the second Zn site, Zn(2) is bonded in a 11-coordinate geometry to two equivalent Th(1), one Zn(6), two equivalent Zn(1), two equivalent Zn(4), and four equivalent Zn(5) atoms. The Zn(2)-Zn(6) bond length is 2.67 Å. Both Zn(2)-Zn(4) bond lengths are 2.95 Å. All Zn(2)-Zn(5) bond lengths are 2.57 Å. In the third Zn site, Zn(3) is bonded in a 8-coordinate geometry to four equivalent Zn(1) and four equivalent Zn(5) atoms. All Zn(3)-Zn(5) bond lengths are 2.74 Å. In the fourth Zn site, Zn(4) is bonded to four equivalent Th(1), four equivalent Zn(2), and four equivalent Zn(5) atoms to form ZnTh4Zn8 cuboctahedra that share corners with four equivalent Zn(4)Th4Zn8 cuboctahedra, edges with two equivalent Zn(4)Th4Zn8 cuboctahedra, faces with two equivalent Zn(4)Th4Zn8 cuboctahedra, and faces with eight equivalent Zn(1)ThZn11 cuboctahedra. All Zn(4)-Zn(5) bond lengths are 2.57 Å. In the fifth Zn site, Zn(5) is bonded in a 10-coordinate geometry to two equivalent Th(1), one Zn(3), one Zn(4), two equivalent Zn(1), two equivalent Zn(2), and two equivalent Zn(5) atoms. There is one shorter (2.45 Å) and one longer (2.67 Å) Zn(5)-Zn(5) bond length. In the sixth Zn site, Zn(6) is bonded in a hexagonal planar geometry to two equivalent Zn(2) and four equivalent Zn(1) atoms.