SmIr2Si2 crystallizes in the tetragonal I4/mmm space group. Sm(1) is bonded in a 16-coordinate geometry to eight equivalent Ir(1) and eight equivalent Si(1) atoms. Ir(1) is bonded in a 4-coordinate geometry to four equivalent Sm(1) and four equivalent Si(1) atoms. Si(1) is bonded in a 4-coordinate geometry to four equivalent Sm(1) and four equivalent Ir(1) atoms.
SmIr2Si2 crystallizes in the tetragonal I4/mmm space group. Sm(1) is bonded in a 16-coordinate geometry to eight equivalent Ir(1) and eight equivalent Si(1) atoms. All Sm(1)-Ir(1) bond lengths are 3.27 Å. All Sm(1)-Si(1) bond lengths are 3.26 Å. Ir(1) is bonded in a 4-coordinate geometry to four equivalent Sm(1) and four equivalent Si(1) atoms. All Ir(1)-Si(1) bond lengths are 2.42 Å. Si(1) is bonded in a 4-coordinate geometry to four equivalent Sm(1) and four equivalent Ir(1) atoms.