MgSm2Ni2 crystallizes in the tetragonal P4/mbm space group. Mg(1) is bonded to eight equivalent Sm(1) and four equivalent Ni(1) atoms to form a mixture of distorted corner and face-sharing MgSm8Ni4 cuboctahedra. Sm(1) is bonded in a 6-coordinate geometry to four equivalent Mg(1) and six equivalent Ni(1) atoms. Ni(1) is bonded in a 9-coordinate geometry to two equivalent Mg(1), six equivalent Sm(1), and one Ni(1) atom.
MgSm2Ni2 crystallizes in the tetragonal P4/mbm space group. Mg(1) is bonded to eight equivalent Sm(1) and four equivalent Ni(1) atoms to form a mixture of distorted corner and face-sharing MgSm8Ni4 cuboctahedra. All Mg(1)-Sm(1) bond lengths are 3.34 Å. All Mg(1)-Ni(1) bond lengths are 2.98 Å. Sm(1) is bonded in a 6-coordinate geometry to four equivalent Mg(1) and six equivalent Ni(1) atoms. There are two shorter (2.90 Å) and four longer (2.91 Å) Sm(1)-Ni(1) bond lengths. Ni(1) is bonded in a 9-coordinate geometry to two equivalent Mg(1), six equivalent Sm(1), and one Ni(1) atom. The Ni(1)-Ni(1) bond length is 2.47 Å.