Dy2CuZnSi2 is hexagonal omega structure-derived structured and crystallizes in the orthorhombic Pmm2 space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded to two equivalent Cu(1), four equivalent Zn(1), two equivalent Si(2), and four equivalent Si(1) atoms to form DyZn4Cu2Si6 cuboctahedra that share edges with four equivalent Dy(1)Zn4Cu2Si6 cuboctahedra, edges with eight equivalent Dy(2)Zn2Cu4Si6 cuboctahedra, faces with four equivalent Dy(2)Zn2Cu4Si6 cuboctahedra, and faces with four equivalent Dy(1)Zn4Cu2Si6 cuboctahedra. In the second Dy site, Dy(2) is bonded to four equivalent Cu(1), two equivalent Zn(1), two equivalent Si(1), and four equivalent Si(2) atoms to form DyZn2Cu4Si6 cuboctahedra that share edges with four equivalent Dy(2)Zn2Cu4Si6 cuboctahedra, edges with eight equivalent Dy(1)Zn4Cu2Si6 cuboctahedra, faces with four equivalent Dy(2)Zn2Cu4Si6 cuboctahedra, and faces with four equivalent Dy(1)Zn4Cu2Si6 cuboctahedra. Cu(1) is bonded in a 9-coordinate geometry to two equivalent Dy(1), four equivalent Dy(2), one Si(2), and two equivalent Si(1) atoms. Zn(1) is bonded in a distorted trigonal planar geometry to two equivalent Dy(2), four equivalent Dy(1), one Si(1), and two equivalent Si(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to two equivalent Dy(2), four equivalent Dy(1), two equivalent Cu(1), and one Zn(1) atom. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Dy(1), four equivalent Dy(2), one Cu(1), and two equivalent Zn(1) atoms.
Dy2CuZnSi2 is hexagonal omega structure-derived structured and crystallizes in the orthorhombic Pmm2 space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded to two equivalent Cu(1), four equivalent Zn(1), two equivalent Si(2), and four equivalent Si(1) atoms to form DyZn4Cu2Si6 cuboctahedra that share edges with four equivalent Dy(1)Zn4Cu2Si6 cuboctahedra, edges with eight equivalent Dy(2)Zn2Cu4Si6 cuboctahedra, faces with four equivalent Dy(2)Zn2Cu4Si6 cuboctahedra, and faces with four equivalent Dy(1)Zn4Cu2Si6 cuboctahedra. Both Dy(1)-Cu(1) bond lengths are 3.07 Å. All Dy(1)-Zn(1) bond lengths are 3.10 Å. Both Dy(1)-Si(2) bond lengths are 3.15 Å. All Dy(1)-Si(1) bond lengths are 3.10 Å. In the second Dy site, Dy(2) is bonded to four equivalent Cu(1), two equivalent Zn(1), two equivalent Si(1), and four equivalent Si(2) atoms to form DyZn2Cu4Si6 cuboctahedra that share edges with four equivalent Dy(2)Zn2Cu4Si6 cuboctahedra, edges with eight equivalent Dy(1)Zn4Cu2Si6 cuboctahedra, faces with four equivalent Dy(2)Zn2Cu4Si6 cuboctahedra, and faces with four equivalent Dy(1)Zn4Cu2Si6 cuboctahedra. All Dy(2)-Cu(1) bond lengths are 3.09 Å. Both Dy(2)-Zn(1) bond lengths are 3.12 Å. Both Dy(2)-Si(1) bond lengths are 3.04 Å. All Dy(2)-Si(2) bond lengths are 3.08 Å. Cu(1) is bonded in a 9-coordinate geometry to two equivalent Dy(1), four equivalent Dy(2), one Si(2), and two equivalent Si(1) atoms. The Cu(1)-Si(2) bond length is 2.31 Å. Both Cu(1)-Si(1) bond lengths are 2.33 Å. Zn(1) is bonded in a distorted trigonal planar geometry to two equivalent Dy(2), four equivalent Dy(1), one Si(1), and two equivalent Si(2) atoms. The Zn(1)-Si(1) bond length is 2.38 Å. Both Zn(1)-Si(2) bond lengths are 2.38 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to two equivalent Dy(2), four equivalent Dy(1), two equivalent Cu(1), and one Zn(1) atom. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Dy(1), four equivalent Dy(2), one Cu(1), and two equivalent Zn(1) atoms.