HoIrGe2 crystallizes in the orthorhombic Immm space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a 15-coordinate geometry to six equivalent Ir(1), one Ge(3), two equivalent Ge(2), and six equivalent Ge(1) atoms. In the second Ho site, Ho(2) is bonded in a 14-coordinate geometry to four equivalent Ir(1), two equivalent Ge(1), four equivalent Ge(2), and four equivalent Ge(3) atoms. Ir(1) is bonded in a 10-coordinate geometry to two equivalent Ho(2), three equivalent Ho(1), one Ge(2), one Ge(3), and three equivalent Ge(1) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to one Ho(2), three equivalent Ho(1), three equivalent Ir(1), and one Ge(1) atom. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Ho(1), four equivalent Ho(2), two equivalent Ir(1), and one Ge(2) atom. In the third Ge site, Ge(3) is bonded in a 2-coordinate geometry to one Ho(1), four equivalent Ho(2), and two equivalent Ir(1) atoms.
HoIrGe2 crystallizes in the orthorhombic Immm space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a 15-coordinate geometry to six equivalent Ir(1), one Ge(3), two equivalent Ge(2), and six equivalent Ge(1) atoms. There are four shorter (3.22 Å) and two longer (3.25 Å) Ho(1)-Ir(1) bond lengths. The Ho(1)-Ge(3) bond length is 3.48 Å. Both Ho(1)-Ge(2) bond lengths are 2.97 Å. There are four shorter (2.93 Å) and two longer (3.06 Å) Ho(1)-Ge(1) bond lengths. In the second Ho site, Ho(2) is bonded in a 14-coordinate geometry to four equivalent Ir(1), two equivalent Ge(1), four equivalent Ge(2), and four equivalent Ge(3) atoms. All Ho(2)-Ir(1) bond lengths are 3.15 Å. Both Ho(2)-Ge(1) bond lengths are 3.36 Å. All Ho(2)-Ge(2) bond lengths are 3.24 Å. All Ho(2)-Ge(3) bond lengths are 3.36 Å. Ir(1) is bonded in a 10-coordinate geometry to two equivalent Ho(2), three equivalent Ho(1), one Ge(2), one Ge(3), and three equivalent Ge(1) atoms. The Ir(1)-Ge(2) bond length is 2.47 Å. The Ir(1)-Ge(3) bond length is 2.45 Å. There are two shorter (2.46 Å) and one longer (2.61 Å) Ir(1)-Ge(1) bond length. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to one Ho(2), three equivalent Ho(1), three equivalent Ir(1), and one Ge(1) atom. The Ge(1)-Ge(1) bond length is 2.70 Å. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Ho(1), four equivalent Ho(2), two equivalent Ir(1), and one Ge(2) atom. The Ge(2)-Ge(2) bond length is 2.45 Å. In the third Ge site, Ge(3) is bonded in a 2-coordinate geometry to one Ho(1), four equivalent Ho(2), and two equivalent Ir(1) atoms.