MgZn5 crystallizes in the hexagonal P-62m space group. Mg(1) is bonded to six Zn(1,1) and six Zn(2,2) atoms to form MgZn12 cuboctahedra that share corners with eighteen Zn(2,2)Mg3Zn9 cuboctahedra; edges with six equivalent Mg(1)Zn12 cuboctahedra; faces with two equivalent Mg(1)Zn12 cuboctahedra; and faces with six Zn(2,2)Mg3Zn9 cuboctahedra. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 12-coordinate geometry to two equivalent Mg(1); four Zn(2,2); and six Zn(1,1) atoms. In the second Zn site, Zn(1) is bonded in a 12-coordinate geometry to two equivalent Mg(1); four Zn(2,2); and six equivalent Zn(1) atoms. In the third Zn site, Zn(2) is bonded to three equivalent Mg(1); three equivalent Zn(2); and six Zn(1,1) atoms to form distorted ZnMg3Zn9 cuboctahedra that share corners with nine equivalent Mg(1)Zn12 cuboctahedra; corners with nine equivalent Zn(2)Mg3Zn9 cuboctahedra; edges with six equivalent Zn(2)Mg3Zn9 cuboctahedra; faces with three equivalent Mg(1)Zn12 cuboctahedra; and faces with five Zn(2,2)Mg3Zn9 cuboctahedra. In the fourth Zn site, Zn(2) is bonded to three equivalent Mg(1); three equivalent Zn(2); and six Zn(1,1) atoms to form distorted ZnMg3Zn9 cuboctahedra that share corners with nine equivalent Mg(1)Zn12 cuboctahedra; corners with nine equivalent Zn(2)Mg3Zn9 cuboctahedra; edges with six equivalent Zn(2)Mg3Zn9 cuboctahedra; faces with three equivalent Mg(1)Zn12 cuboctahedra; and faces with five Zn(2,2)Mg3Zn9 cuboctahedra.
MgZn5 crystallizes in the hexagonal P-62m space group. Mg(1) is bonded to six Zn(1,1) and six Zn(2,2) atoms to form MgZn12 cuboctahedra that share corners with eighteen Zn(2,2)Mg3Zn9 cuboctahedra; edges with six equivalent Mg(1)Zn12 cuboctahedra; faces with two equivalent Mg(1)Zn12 cuboctahedra; and faces with six Zn(2,2)Mg3Zn9 cuboctahedra. All Mg(1)-Zn(1,1) bond lengths are 2.83 Å. All Mg(1)-Zn(2,2) bond lengths are 2.80 Å. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 12-coordinate geometry to two equivalent Mg(1); four Zn(2,2); and six Zn(1,1) atoms. All Zn(1)-Zn(2,2) bond lengths are 2.71 Å. There are four shorter (2.68 Å) and two longer (3.05 Å) Zn(1)-Zn(1,1) bond lengths. In the second Zn site, Zn(1) is bonded in a 12-coordinate geometry to two equivalent Mg(1); four Zn(2,2); and six equivalent Zn(1) atoms. All Zn(1)-Zn(2,2) bond lengths are 2.71 Å. In the third Zn site, Zn(2) is bonded to three equivalent Mg(1); three equivalent Zn(2); and six Zn(1,1) atoms to form distorted ZnMg3Zn9 cuboctahedra that share corners with nine equivalent Mg(1)Zn12 cuboctahedra; corners with nine equivalent Zn(2)Mg3Zn9 cuboctahedra; edges with six equivalent Zn(2)Mg3Zn9 cuboctahedra; faces with three equivalent Mg(1)Zn12 cuboctahedra; and faces with five Zn(2,2)Mg3Zn9 cuboctahedra. All Zn(2)-Zn(2) bond lengths are 2.80 Å. In the fourth Zn site, Zn(2) is bonded to three equivalent Mg(1); three equivalent Zn(2); and six Zn(1,1) atoms to form distorted ZnMg3Zn9 cuboctahedra that share corners with nine equivalent Mg(1)Zn12 cuboctahedra; corners with nine equivalent Zn(2)Mg3Zn9 cuboctahedra; edges with six equivalent Zn(2)Mg3Zn9 cuboctahedra; faces with three equivalent Mg(1)Zn12 cuboctahedra; and faces with five Zn(2,2)Mg3Zn9 cuboctahedra.