SmNi2P2 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 P(1) atoms. Ni(1) is bonded to four equivalent Sm(1) and four equivalent P(1) atoms to form a mixture of distorted edge, face, and corner-sharing NiSm4P4 tetrahedra. P(1) is bonded in a 9-coordinate geometry to four equivalent Sm(1), four equivalent Ni(1), and one P(1) atom.
SmNi2P2 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 P(1) atoms. All Sm(1)-Ni(1) bond lengths are 3.06 Å. All Sm(1)-P(1) bond lengths are 3.01 Å. Ni(1) is bonded to four equivalent Sm(1) and four equivalent P(1) atoms to form a mixture of distorted edge, face, and corner-sharing NiSm4P4 tetrahedra. All Ni(1)-P(1) bond lengths are 2.27 Å. P(1) is bonded in a 9-coordinate geometry to four equivalent Sm(1), four equivalent Ni(1), and one P(1) atom. The P(1)-P(1) bond length is 2.39 Å.