Dy(NiBi)2 crystallizes in the tetragonal P4/nmm space group. Dy(1) is bonded in a 17-coordinate geometry to four equivalent Ni(1), four equivalent Ni(2), four equivalent Bi(1), and five equivalent Bi(2) atoms. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a distorted body-centered cubic geometry to four equivalent Dy(1) and four equivalent Bi(2) atoms. In the second Ni site, Ni(2) is bonded in a 9-coordinate geometry to four equivalent Dy(1), one Bi(2), and four equivalent Bi(1) atoms. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 4-coordinate geometry to four equivalent Dy(1) and four equivalent Ni(2) atoms. In the second Bi site, Bi(2) is bonded in a 5-coordinate geometry to five equivalent Dy(1), one Ni(2), and four equivalent Ni(1) atoms.
Dy(NiBi)2 crystallizes in the tetragonal P4/nmm space group. Dy(1) is bonded in a 17-coordinate geometry to four equivalent Ni(1), four equivalent Ni(2), four equivalent Bi(1), and five equivalent Bi(2) atoms. All Dy(1)-Ni(1) bond lengths are 3.25 Å. All Dy(1)-Ni(2) bond lengths are 3.58 Å. All Dy(1)-Bi(1) bond lengths are 3.67 Å. There are four shorter (3.41 Å) and one longer (3.58 Å) Dy(1)-Bi(2) bond length. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a distorted body-centered cubic geometry to four equivalent Dy(1) and four equivalent Bi(2) atoms. All Ni(1)-Bi(2) bond lengths are 2.63 Å. In the second Ni site, Ni(2) is bonded in a 9-coordinate geometry to four equivalent Dy(1), one Bi(2), and four equivalent Bi(1) atoms. The Ni(2)-Bi(2) bond length is 2.51 Å. All Ni(2)-Bi(1) bond lengths are 2.67 Å. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 4-coordinate geometry to four equivalent Dy(1) and four equivalent Ni(2) atoms. In the second Bi site, Bi(2) is bonded in a 5-coordinate geometry to five equivalent Dy(1), one Ni(2), and four equivalent Ni(1) atoms.