EuIrGe3 crystallizes in the tetragonal I4mm space group. Eu(1) is bonded in a 17-coordinate geometry to five equivalent Ir(1), four equivalent Ge(2), and eight equivalent Ge(1) atoms. Ir(1) is bonded in a 5-coordinate geometry to five equivalent Eu(1), one Ge(2), and four equivalent Ge(1) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 2-coordinate geometry to four equivalent Eu(1), two equivalent Ir(1), and two equivalent Ge(2) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to four equivalent Eu(1), one Ir(1), and four equivalent Ge(1) atoms.
EuIrGe3 crystallizes in the tetragonal I4mm space group. Eu(1) is bonded in a 17-coordinate geometry to five equivalent Ir(1), four equivalent Ge(2), and eight equivalent Ge(1) atoms. All Eu(1)-Ir(1) bond lengths are 3.52 Å. All Eu(1)-Ge(2) bond lengths are 3.28 Å. There are four shorter (3.34 Å) and four longer (3.42 Å) Eu(1)-Ge(1) bond lengths. Ir(1) is bonded in a 5-coordinate geometry to five equivalent Eu(1), one Ge(2), and four equivalent Ge(1) atoms. The Ir(1)-Ge(2) bond length is 2.40 Å. All Ir(1)-Ge(1) bond lengths are 2.47 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 2-coordinate geometry to four equivalent Eu(1), two equivalent Ir(1), and two equivalent Ge(2) atoms. Both Ge(1)-Ge(2) bond lengths are 2.77 Å. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to four equivalent Eu(1), one Ir(1), and four equivalent Ge(1) atoms.