Sm(NiAs)2 crystallizes in the tetragonal I4/mmm space group. Sm(1) is bonded in a 16-coordinate geometry to eight equivalent Ni(1) and eight equivalent As(1) atoms. Ni(1) is bonded in a 4-coordinate geometry to four equivalent Sm(1) and four equivalent As(1) atoms. As(1) is bonded in a 9-coordinate geometry to four equivalent Sm(1), four equivalent Ni(1), and one As(1) atom.
Sm(NiAs)2 crystallizes in the tetragonal I4/mmm space group. Sm(1) is bonded in a 16-coordinate geometry to eight equivalent Ni(1) and eight equivalent As(1) atoms. All Sm(1)-Ni(1) bond lengths are 3.17 Å. All Sm(1)-As(1) bond lengths are 3.14 Å. Ni(1) is bonded in a 4-coordinate geometry to four equivalent Sm(1) and four equivalent As(1) atoms. All Ni(1)-As(1) bond lengths are 2.32 Å. As(1) is bonded in a 9-coordinate geometry to four equivalent Sm(1), four equivalent Ni(1), and one As(1) atom. The As(1)-As(1) bond length is 2.62 Å.