EuIr2Si2 crystallizes in the tetragonal I4/mmm space group. Eu(1) is bonded in a 16-coordinate geometry to eight equivalent Ir(1) and eight equivalent Si(1) atoms. Ir(1) is bonded to four equivalent Eu(1) and four equivalent Si(1) atoms to form a mixture of distorted edge, face, and corner-sharing IrEu4Si4 tetrahedra. Si(1) is bonded in a 9-coordinate geometry to four equivalent Eu(1), four equivalent Ir(1), and one Si(1) atom.
EuIr2Si2 crystallizes in the tetragonal I4/mmm space group. Eu(1) is bonded in a 16-coordinate geometry to eight equivalent Ir(1) and eight equivalent Si(1) atoms. All Eu(1)-Ir(1) bond lengths are 3.27 Å. All Eu(1)-Si(1) bond lengths are 3.18 Å. Ir(1) is bonded to four equivalent Eu(1) and four equivalent Si(1) atoms to form a mixture of distorted edge, face, and corner-sharing IrEu4Si4 tetrahedra. All Ir(1)-Si(1) bond lengths are 2.40 Å. Si(1) is bonded in a 9-coordinate geometry to four equivalent Eu(1), four equivalent Ir(1), and one Si(1) atom. The Si(1)-Si(1) bond length is 2.60 Å.