YbZn11 crystallizes in the monoclinic C2/c space group. Yb(1) is bonded in a 18-coordinate geometry to two equivalent Zn(5), four equivalent Zn(1), four equivalent Zn(2), four equivalent Zn(3), and four equivalent Zn(4) atoms. There are seven inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent Yb(1), one Zn(1), one Zn(2), one Zn(5), two equivalent Zn(3), two equivalent Zn(6), and three equivalent Zn(4) atoms to form a mixture of distorted face, corner, and edge-sharing ZnYb2Zn10 cuboctahedra. In the second Zn site, Zn(2) is bonded to two equivalent Yb(1), one Zn(1), one Zn(2), one Zn(5), two equivalent Zn(4), two equivalent Zn(7), and three equivalent Zn(3) atoms to form a mixture of distorted face, corner, and edge-sharing ZnYb2Zn10 cuboctahedra. In the third Zn site, Zn(3) is bonded to two equivalent Yb(1), one Zn(3), one Zn(4), one Zn(5), one Zn(6), one Zn(7), two equivalent Zn(1), and three equivalent Zn(2) atoms to form a mixture of distorted face, corner, and edge-sharing ZnYb2Zn10 cuboctahedra. In the fourth Zn site, Zn(4) is bonded to two equivalent Yb(1), one Zn(3), one Zn(4), one Zn(5), one Zn(6), one Zn(7), two equivalent Zn(2), and three equivalent Zn(1) atoms to form a mixture of distorted face, corner, and edge-sharing ZnYb2Zn10 cuboctahedra. In the fifth Zn site, Zn(5) is bonded in a 14-coordinate geometry to two equivalent Yb(1), two equivalent Zn(1), two equivalent Zn(2), two equivalent Zn(3), two equivalent Zn(4), two equivalent Zn(6), and two equivalent Zn(7) atoms. In the sixth Zn site, Zn(6) is bonded in a 10-coordinate geometry to two equivalent Zn(3), two equivalent Zn(4), two equivalent Zn(5), and four equivalent Zn(1) atoms. In the seventh Zn site, Zn(7) is bonded in a 10-coordinate geometry to two equivalent Zn(3), two equivalent Zn(4), two equivalent Zn(5), and four equivalent Zn(2) atoms.
YbZn11 crystallizes in the monoclinic C2/c space group. Yb(1) is bonded in a 18-coordinate geometry to two equivalent Zn(5), four equivalent Zn(1), four equivalent Zn(2), four equivalent Zn(3), and four equivalent Zn(4) atoms. Both Yb(1)-Zn(5) bond lengths are 3.36 Å. There are two shorter (3.22 Å) and two longer (3.34 Å) Yb(1)-Zn(1) bond lengths. There are two shorter (3.23 Å) and two longer (3.34 Å) Yb(1)-Zn(2) bond lengths. There are two shorter (3.23 Å) and two longer (3.34 Å) Yb(1)-Zn(3) bond lengths. There are two shorter (3.22 Å) and two longer (3.34 Å) Yb(1)-Zn(4) bond lengths. There are seven inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent Yb(1), one Zn(1), one Zn(2), one Zn(5), two equivalent Zn(3), two equivalent Zn(6), and three equivalent Zn(4) atoms to form a mixture of distorted face, corner, and edge-sharing ZnYb2Zn10 cuboctahedra. The Zn(1)-Zn(1) bond length is 2.94 Å. The Zn(1)-Zn(2) bond length is 2.65 Å. The Zn(1)-Zn(5) bond length is 2.83 Å. There is one shorter (2.62 Å) and one longer (2.86 Å) Zn(1)-Zn(3) bond length. There is one shorter (2.55 Å) and one longer (2.59 Å) Zn(1)-Zn(6) bond length. There are a spread of Zn(1)-Zn(4) bond distances ranging from 2.53-2.62 Å. In the second Zn site, Zn(2) is bonded to two equivalent Yb(1), one Zn(1), one Zn(2), one Zn(5), two equivalent Zn(4), two equivalent Zn(7), and three equivalent Zn(3) atoms to form a mixture of distorted face, corner, and edge-sharing ZnYb2Zn10 cuboctahedra. The Zn(2)-Zn(2) bond length is 2.93 Å. The Zn(2)-Zn(5) bond length is 2.82 Å. There is one shorter (2.62 Å) and one longer (2.86 Å) Zn(2)-Zn(4) bond length. There is one shorter (2.55 Å) and one longer (2.58 Å) Zn(2)-Zn(7) bond length. There are a spread of Zn(2)-Zn(3) bond distances ranging from 2.53-2.62 Å. In the third Zn site, Zn(3) is bonded to two equivalent Yb(1), one Zn(3), one Zn(4), one Zn(5), one Zn(6), one Zn(7), two equivalent Zn(1), and three equivalent Zn(2) atoms to form a mixture of distorted face, corner, and edge-sharing ZnYb2Zn10 cuboctahedra. The Zn(3)-Zn(3) bond length is 2.64 Å. The Zn(3)-Zn(4) bond length is 2.93 Å. The Zn(3)-Zn(5) bond length is 2.83 Å. The Zn(3)-Zn(6) bond length is 2.58 Å. The Zn(3)-Zn(7) bond length is 2.55 Å. In the fourth Zn site, Zn(4) is bonded to two equivalent Yb(1), one Zn(3), one Zn(4), one Zn(5), one Zn(6), one Zn(7), two equivalent Zn(2), and three equivalent Zn(1) atoms to form a mixture of distorted face, corner, and edge-sharing ZnYb2Zn10 cuboctahedra. The Zn(4)-Zn(4) bond length is 2.65 Å. The Zn(4)-Zn(5) bond length is 2.83 Å. The Zn(4)-Zn(6) bond length is 2.55 Å. The Zn(4)-Zn(7) bond length is 2.58 Å. In the fifth Zn site, Zn(5) is bonded in a 14-coordinate geometry to two equivalent Yb(1), two equivalent Zn(1), two equivalent Zn(2), two equivalent Zn(3), two equivalent Zn(4), two equivalent Zn(6), and two equivalent Zn(7) atoms. Both Zn(5)-Zn(6) bond lengths are 2.74 Å. Both Zn(5)-Zn(7) bond lengths are 2.74 Å. In the sixth Zn site, Zn(6) is bonded in a 10-coordinate geometry to two equivalent Zn(3), two equivalent Zn(4), two equivalent Zn(5), and four equivalent Zn(1) atoms. In the seventh Zn site, Zn(7) is bonded in a 10-coordinate geometry to two equivalent Zn(3), two equivalent Zn(4), two equivalent Zn(5), and four equivalent Zn(2) atoms.