MgZn5 is Bergman Structure: Mg32(Al,Zn)49 Bergman-derived structured and crystallizes in the monoclinic C2/m space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 16-coordinate geometry to one Mg(2), two equivalent Mg(1), one Zn(3), two equivalent Zn(5), three equivalent Zn(4), three equivalent Zn(7), and four equivalent Zn(6) atoms. In the second Mg site, Mg(2) is bonded in a 16-coordinate geometry to one Mg(1), one Mg(2), one Zn(1), one Zn(9), two equivalent Zn(2), two equivalent Zn(4), two equivalent Zn(6), two equivalent Zn(8), and four equivalent Zn(5) atoms. There are nine inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent Mg(2), two equivalent Zn(9), four equivalent Zn(2), and four equivalent Zn(6) atoms to form distorted ZnMg2Zn10 cuboctahedra that share edges with two equivalent Zn(1)Mg2Zn10 cuboctahedra, edges with four equivalent Zn(8)Mg4Zn8 cuboctahedra, faces with two equivalent Zn(7)Mg3Zn9 cuboctahedra, and faces with four equivalent Zn(4)Mg5Zn7 cuboctahedra. In the second Zn site, Zn(2) is bonded in a 13-coordinate geometry to two equivalent Mg(2), one Zn(3), one Zn(4), one Zn(8), two equivalent Zn(1), two equivalent Zn(5), two equivalent Zn(6), and two equivalent Zn(9) atoms. In the third Zn site, Zn(3) is bonded in a 13-coordinate geometry to one Mg(1), one Zn(2), two equivalent Zn(6), two equivalent Zn(9), three equivalent Zn(7), and four equivalent Zn(5) atoms. In the fourth Zn site, Zn(4) is bonded to two equivalent Mg(2), three equivalent Mg(1), one Zn(2), one Zn(7), one Zn(8), two equivalent Zn(5), and two equivalent Zn(6) atoms to form distorted ZnMg5Zn7 cuboctahedra that share  a cornercorner with one Zn(4)Mg5Zn7 cuboctahedra, corners with two equivalent Zn(7)Mg3Zn9 cuboctahedra, corners with two equivalent Zn(8)Mg4Zn8 cuboctahedra, edges with four equivalent Zn(4)Mg5Zn7 cuboctahedra,  a faceface with one Zn(8)Mg4Zn8 cuboctahedra, faces with two equivalent Zn(1)Mg2Zn10 cuboctahedra, and faces with three equivalent Zn(7)Mg3Zn9 cuboctahedra. In the fifth Zn site, Zn(5) is bonded in a 12-coordinate geometry to one Mg(1), two equivalent Mg(2), one Zn(2), one Zn(4), one Zn(7), one Zn(8), one Zn(9), two equivalent Zn(3), and two equivalent Zn(5) atoms. In the sixth Zn site, Zn(6) is bonded in a 11-coordinate geometry to one Mg(2), two equivalent Mg(1), one Zn(1), one Zn(2), one Zn(3), one Zn(4), one Zn(7), one Zn(9), and two equivalent Zn(6) atoms. In the seventh Zn site, Zn(7) is bonded to three equivalent Mg(1), one Zn(4), one Zn(9), two equivalent Zn(5), two equivalent Zn(6), and three equivalent Zn(3) atoms to form distorted ZnMg3Zn9 cuboctahedra that share corners with two equivalent Zn(4)Mg5Zn7 cuboctahedra, edges with six equivalent Zn(7)Mg3Zn9 cuboctahedra,  a faceface with one Zn(1)Mg2Zn10 cuboctahedra,  a faceface with one Zn(8)Mg4Zn8 cuboctahedra, and faces with three equivalent Zn(4)Mg5Zn7 cuboctahedra. In the eighth Zn site, Zn(8) is bonded to four equivalent Mg(2), two equivalent Zn(2), two equivalent Zn(4), and four equivalent Zn(5) atoms to form ZnMg4Zn8 cuboctahedra that share corners with four equivalent Zn(4)Mg5Zn7 cuboctahedra, edges with two equivalent Zn(8)Mg4Zn8 cuboctahedra, edges with four equivalent Zn(1)Mg2Zn10 cuboctahedra, faces with two equivalent Zn(7)Mg3Zn9 cuboctahedra, and faces with two equivalent Zn(4)Mg5Zn7 cuboctahedra. In the ninth Zn site, Zn(9) is bonded in a 11-coordinate geometry to one Mg(2), one Zn(1), one Zn(7), two equivalent Zn(2), two equivalent Zn(3), two equivalent Zn(5), and two equivalent Zn(6) atoms.
MgZn5 is Bergman Structure: Mg32(Al,Zn)49 Bergman-derived structured and crystallizes in the monoclinic C2/m space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 16-coordinate geometry to one Mg(2), two equivalent Mg(1), one Zn(3), two equivalent Zn(5), three equivalent Zn(4), three equivalent Zn(7), and four equivalent Zn(6) atoms. The Mg(1)-Mg(2) bond length is 3.27 Å. Both Mg(1)-Mg(1) bond lengths are 3.27 Å. The Mg(1)-Zn(3) bond length is 2.98 Å. Both Mg(1)-Zn(5) bond lengths are 3.05 Å. There are two shorter (3.03 Å) and one longer (3.32 Å) Mg(1)-Zn(4) bond length. There are two shorter (2.98 Å) and one longer (3.29 Å) Mg(1)-Zn(7) bond length. There are two shorter (2.97 Å) and two longer (2.99 Å) Mg(1)-Zn(6) bond lengths. In the second Mg site, Mg(2) is bonded in a 16-coordinate geometry to one Mg(1), one Mg(2), one Zn(1), one Zn(9), two equivalent Zn(2), two equivalent Zn(4), two equivalent Zn(6), two equivalent Zn(8), and four equivalent Zn(5) atoms. The Mg(2)-Mg(2) bond length is 3.30 Å. The Mg(2)-Zn(1) bond length is 2.94 Å. The Mg(2)-Zn(9) bond length is 2.84 Å. Both Mg(2)-Zn(2) bond lengths are 3.10 Å. Both Mg(2)-Zn(4) bond lengths are 2.97 Å. Both Mg(2)-Zn(6) bond lengths are 3.11 Å. Both Mg(2)-Zn(8) bond lengths are 3.01 Å. There are two shorter (3.03 Å) and two longer (3.27 Å) Mg(2)-Zn(5) bond lengths. There are nine inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent Mg(2), two equivalent Zn(9), four equivalent Zn(2), and four equivalent Zn(6) atoms to form distorted ZnMg2Zn10 cuboctahedra that share edges with two equivalent Zn(1)Mg2Zn10 cuboctahedra, edges with four equivalent Zn(8)Mg4Zn8 cuboctahedra, faces with two equivalent Zn(7)Mg3Zn9 cuboctahedra, and faces with four equivalent Zn(4)Mg5Zn7 cuboctahedra. Both Zn(1)-Zn(9) bond lengths are 2.56 Å. All Zn(1)-Zn(2) bond lengths are 3.02 Å. All Zn(1)-Zn(6) bond lengths are 2.65 Å. In the second Zn site, Zn(2) is bonded in a 13-coordinate geometry to two equivalent Mg(2), one Zn(3), one Zn(4), one Zn(8), two equivalent Zn(1), two equivalent Zn(5), two equivalent Zn(6), and two equivalent Zn(9) atoms. The Zn(2)-Zn(3) bond length is 3.09 Å. The Zn(2)-Zn(4) bond length is 3.05 Å. The Zn(2)-Zn(8) bond length is 2.94 Å. Both Zn(2)-Zn(5) bond lengths are 3.08 Å. Both Zn(2)-Zn(6) bond lengths are 2.96 Å. Both Zn(2)-Zn(9) bond lengths are 2.86 Å. In the third Zn site, Zn(3) is bonded in a 13-coordinate geometry to one Mg(1), one Zn(2), two equivalent Zn(6), two equivalent Zn(9), three equivalent Zn(7), and four equivalent Zn(5) atoms. Both Zn(3)-Zn(6) bond lengths are 3.03 Å. Both Zn(3)-Zn(9) bond lengths are 3.06 Å. There are two shorter (2.88 Å) and one longer (2.98 Å) Zn(3)-Zn(7) bond length. There are two shorter (2.79 Å) and two longer (3.08 Å) Zn(3)-Zn(5) bond lengths. In the fourth Zn site, Zn(4) is bonded to two equivalent Mg(2), three equivalent Mg(1), one Zn(2), one Zn(7), one Zn(8), two equivalent Zn(5), and two equivalent Zn(6) atoms to form distorted ZnMg5Zn7 cuboctahedra that share  a cornercorner with one Zn(4)Mg5Zn7 cuboctahedra, corners with two equivalent Zn(7)Mg3Zn9 cuboctahedra, corners with two equivalent Zn(8)Mg4Zn8 cuboctahedra, edges with four equivalent Zn(4)Mg5Zn7 cuboctahedra,  a faceface with one Zn(8)Mg4Zn8 cuboctahedra, faces with two equivalent Zn(1)Mg2Zn10 cuboctahedra, and faces with three equivalent Zn(7)Mg3Zn9 cuboctahedra. The Zn(4)-Zn(7) bond length is 2.70 Å. The Zn(4)-Zn(8) bond length is 2.71 Å. Both Zn(4)-Zn(5) bond lengths are 2.60 Å. Both Zn(4)-Zn(6) bond lengths are 2.53 Å. In the fifth Zn site, Zn(5) is bonded in a 12-coordinate geometry to one Mg(1), two equivalent Mg(2), one Zn(2), one Zn(4), one Zn(7), one Zn(8), one Zn(9), two equivalent Zn(3), and two equivalent Zn(5) atoms. The Zn(5)-Zn(7) bond length is 2.64 Å. The Zn(5)-Zn(8) bond length is 2.70 Å. The Zn(5)-Zn(9) bond length is 2.51 Å. There is one shorter (2.49 Å) and one longer (2.56 Å) Zn(5)-Zn(5) bond length. In the sixth Zn site, Zn(6) is bonded in a 11-coordinate geometry to one Mg(2), two equivalent Mg(1), one Zn(1), one Zn(2), one Zn(3), one Zn(4), one Zn(7), one Zn(9), and two equivalent Zn(6) atoms. The Zn(6)-Zn(7) bond length is 2.68 Å. The Zn(6)-Zn(9) bond length is 2.59 Å. There is one shorter (2.49 Å) and one longer (2.55 Å) Zn(6)-Zn(6) bond length. In the seventh Zn site, Zn(7) is bonded to three equivalent Mg(1), one Zn(4), one Zn(9), two equivalent Zn(5), two equivalent Zn(6), and three equivalent Zn(3) atoms to form distorted ZnMg3Zn9 cuboctahedra that share corners with two equivalent Zn(4)Mg5Zn7 cuboctahedra, edges with six equivalent Zn(7)Mg3Zn9 cuboctahedra,  a faceface with one Zn(1)Mg2Zn10 cuboctahedra,  a faceface with one Zn(8)Mg4Zn8 cuboctahedra, and faces with three equivalent Zn(4)Mg5Zn7 cuboctahedra. The Zn(7)-Zn(9) bond length is 2.62 Å. In the eighth Zn site, Zn(8) is bonded to four equivalent Mg(2), two equivalent Zn(2), two equivalent Zn(4), and four equivalent Zn(5) atoms to form ZnMg4Zn8 cuboctahedra that share corners with four equivalent Zn(4)Mg5Zn7 cuboctahedra, edges with two equivalent Zn(8)Mg4Zn8 cuboctahedra, edges with four equivalent Zn(1)Mg2Zn10 cuboctahedra, faces with two equivalent Zn(7)Mg3Zn9 cuboctahedra, and faces with two equivalent Zn(4)Mg5Zn7 cuboctahedra. In the ninth Zn site, Zn(9) is bonded in a 11-coordinate geometry to one Mg(2), one Zn(1), one Zn(7), two equivalent Zn(2), two equivalent Zn(3), two equivalent Zn(5), and two equivalent Zn(6) atoms.