LaCo2Zn is Frank-Kasper $\mu$ Phase-derived structured and crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 12-coordinate geometry to nine equivalent Co(1) and three equivalent Zn(3) atoms. In the second La site, La(2) is bonded in a 18-coordinate geometry to twelve equivalent Co(1), three equivalent Zn(1), and three equivalent Zn(2) atoms. Co(1) is bonded to two equivalent La(2), three equivalent La(1), four equivalent Co(1), one Zn(1), one Zn(2), and one Zn(3) atom to form distorted CoLa5Zn3Co4 cuboctahedra that share corners with two equivalent Zn(3)La6Co6 cuboctahedra, corners with fifteen equivalent Co(1)La5Zn3Co4 cuboctahedra, edges with eight equivalent Co(1)La5Zn3Co4 cuboctahedra, faces with three equivalent Zn(3)La6Co6 cuboctahedra, and faces with eleven equivalent Co(1)La5Zn3Co4 cuboctahedra. There are three inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 9-coordinate geometry to three equivalent La(2) and six equivalent Co(1) atoms. In the second Zn site, Zn(2) is bonded in a 9-coordinate geometry to three equivalent La(2) and six equivalent Co(1) atoms. In the third Zn site, Zn(3) is bonded to six equivalent La(1) and six equivalent Co(1) atoms to form ZnLa6Co6 cuboctahedra that share corners with twelve equivalent Co(1)La5Zn3Co4 cuboctahedra, edges with six equivalent Zn(3)La6Co6 cuboctahedra, and faces with eighteen equivalent Co(1)La5Zn3Co4 cuboctahedra.
LaCo2Zn is Frank-Kasper $\mu$ Phase-derived structured and crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 12-coordinate geometry to nine equivalent Co(1) and three equivalent Zn(3) atoms. There are six shorter (2.93 Å) and three longer (3.27 Å) La(1)-Co(1) bond lengths. All La(1)-Zn(3) bond lengths are 3.10 Å. In the second La site, La(2) is bonded in a 18-coordinate geometry to twelve equivalent Co(1), three equivalent Zn(1), and three equivalent Zn(2) atoms. All La(2)-Co(1) bond lengths are 3.30 Å. All La(2)-Zn(1) bond lengths are 3.00 Å. All La(2)-Zn(2) bond lengths are 3.00 Å. Co(1) is bonded to two equivalent La(2), three equivalent La(1), four equivalent Co(1), one Zn(1), one Zn(2), and one Zn(3) atom to form distorted CoLa5Zn3Co4 cuboctahedra that share corners with two equivalent Zn(3)La6Co6 cuboctahedra, corners with fifteen equivalent Co(1)La5Zn3Co4 cuboctahedra, edges with eight equivalent Co(1)La5Zn3Co4 cuboctahedra, faces with three equivalent Zn(3)La6Co6 cuboctahedra, and faces with eleven equivalent Co(1)La5Zn3Co4 cuboctahedra. All Co(1)-Co(1) bond lengths are 2.60 Å. The Co(1)-Zn(1) bond length is 2.53 Å. The Co(1)-Zn(2) bond length is 2.53 Å. The Co(1)-Zn(3) bond length is 2.61 Å. There are three inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 9-coordinate geometry to three equivalent La(2) and six equivalent Co(1) atoms. In the second Zn site, Zn(2) is bonded in a 9-coordinate geometry to three equivalent La(2) and six equivalent Co(1) atoms. In the third Zn site, Zn(3) is bonded to six equivalent La(1) and six equivalent Co(1) atoms to form ZnLa6Co6 cuboctahedra that share corners with twelve equivalent Co(1)La5Zn3Co4 cuboctahedra, edges with six equivalent Zn(3)La6Co6 cuboctahedra, and faces with eighteen equivalent Co(1)La5Zn3Co4 cuboctahedra.