Nd(NiAs)2 crystallizes in the tetragonal P4/nmm space group. Nd(1) is bonded in a 16-coordinate geometry to four equivalent Ni(1), four equivalent Ni(2), four equivalent As(1), and four equivalent As(2) atoms. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 4-coordinate geometry to four equivalent Nd(1) and four equivalent As(1) atoms. In the second Ni site, Ni(2) is bonded in a 5-coordinate geometry to four equivalent Nd(1), one As(1), and four equivalent As(2) atoms. There are two inequivalent As sites. In the first As site, As(1) is bonded in a 5-coordinate geometry to four equivalent Nd(1), one Ni(2), and four equivalent Ni(1) atoms. In the second As site, As(2) is bonded in a 8-coordinate geometry to four equivalent Nd(1) and four equivalent Ni(2) atoms.
Nd(NiAs)2 crystallizes in the tetragonal P4/nmm space group. Nd(1) is bonded in a 16-coordinate geometry to four equivalent Ni(1), four equivalent Ni(2), four equivalent As(1), and four equivalent As(2) atoms. All Nd(1)-Ni(1) bond lengths are 3.13 Å. All Nd(1)-Ni(2) bond lengths are 3.22 Å. All Nd(1)-As(1) bond lengths are 3.17 Å. All Nd(1)-As(2) bond lengths are 3.16 Å. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 4-coordinate geometry to four equivalent Nd(1) and four equivalent As(1) atoms. All Ni(1)-As(1) bond lengths are 2.42 Å. In the second Ni site, Ni(2) is bonded in a 5-coordinate geometry to four equivalent Nd(1), one As(1), and four equivalent As(2) atoms. The Ni(2)-As(1) bond length is 2.38 Å. All Ni(2)-As(2) bond lengths are 2.37 Å. There are two inequivalent As sites. In the first As site, As(1) is bonded in a 5-coordinate geometry to four equivalent Nd(1), one Ni(2), and four equivalent Ni(1) atoms. In the second As site, As(2) is bonded in a 8-coordinate geometry to four equivalent Nd(1) and four equivalent Ni(2) atoms.