DyNi2Al3 crystallizes in the hexagonal P6/mmm space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 18-coordinate geometry to six equivalent Ni(1), six equivalent Al(1), and six equivalent Al(2) atoms. In the second Dy site, Dy(2) is bonded in a hexagonal planar geometry to six equivalent Ni(1) atoms. Ni(1) is bonded in a 9-coordinate geometry to one Dy(2), two equivalent Dy(1), two equivalent Al(1), and four equivalent Al(2) atoms. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 4-coordinate geometry to four equivalent Dy(1) and four equivalent Ni(1) atoms. In the second Al site, Al(2) is bonded in a 4-coordinate geometry to two equivalent Dy(1) and four equivalent Ni(1) atoms.
DyNi2Al3 crystallizes in the hexagonal P6/mmm space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 18-coordinate geometry to six equivalent Ni(1), six equivalent Al(1), and six equivalent Al(2) atoms. All Dy(1)-Ni(1) bond lengths are 3.11 Å. All Dy(1)-Al(1) bond lengths are 3.28 Å. All Dy(1)-Al(2) bond lengths are 3.16 Å. In the second Dy site, Dy(2) is bonded in a hexagonal planar geometry to six equivalent Ni(1) atoms. All Dy(2)-Ni(1) bond lengths are 2.81 Å. Ni(1) is bonded in a 9-coordinate geometry to one Dy(2), two equivalent Dy(1), two equivalent Al(1), and four equivalent Al(2) atoms. Both Ni(1)-Al(1) bond lengths are 2.48 Å. All Ni(1)-Al(2) bond lengths are 2.47 Å. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 4-coordinate geometry to four equivalent Dy(1) and four equivalent Ni(1) atoms. In the second Al site, Al(2) is bonded in a 4-coordinate geometry to two equivalent Dy(1) and four equivalent Ni(1) atoms.