SmMn3 crystallizes in the hexagonal P6_3/mmc space group. Sm(1) is bonded to twelve equivalent Mn(1) atoms to form a mixture of face and corner-sharing SmMn12 cuboctahedra. Mn(1) is bonded in a 10-coordinate geometry to four equivalent Sm(1) and six equivalent Mn(1) atoms.
SmMn3 crystallizes in the hexagonal P6_3/mmc space group. Sm(1) is bonded to twelve equivalent Mn(1) atoms to form a mixture of face and corner-sharing SmMn12 cuboctahedra. There are six shorter (3.02 Å) and six longer (3.03 Å) Sm(1)-Mn(1) bond lengths. Mn(1) is bonded in a 10-coordinate geometry to four equivalent Sm(1) and six equivalent Mn(1) atoms. There are two shorter (2.65 Å) and four longer (2.77 Å) Mn(1)-Mn(1) bond lengths.