Hf5Ir3 crystallizes in the hexagonal P6_122 space group. There are four inequivalent Hf sites. In the first Hf site, Hf(1) is bonded in a 4-coordinate geometry to two equivalent Ir(1) and two equivalent Ir(2) atoms. In the second Hf site, Hf(2) is bonded in a 6-coordinate geometry to two equivalent Ir(2) and four equivalent Ir(1) atoms. In the third Hf site, Hf(3) is bonded in a 6-coordinate geometry to two equivalent Ir(2) and four equivalent Ir(1) atoms. In the fourth Hf site, Hf(4) is bonded in a 5-coordinate geometry to one Ir(2) and four equivalent Ir(1) atoms. There are two inequivalent Ir sites. In the first Ir site, Ir(2) is bonded in a 9-coordinate geometry to one Hf(4), two equivalent Hf(2), two equivalent Hf(3), and four equivalent Hf(1) atoms. In the second Ir site, Ir(1) is bonded in a 8-coordinate geometry to two equivalent Hf(1), two equivalent Hf(2), two equivalent Hf(3), and two equivalent Hf(4) atoms.
Hf5Ir3 crystallizes in the hexagonal P6_122 space group. There are four inequivalent Hf sites. In the first Hf site, Hf(1) is bonded in a 4-coordinate geometry to two equivalent Ir(1) and two equivalent Ir(2) atoms. There is one shorter (2.86 Å) and one longer (2.87 Å) Hf(1)-Ir(1) bond length. There is one shorter (2.68 Å) and one longer (2.92 Å) Hf(1)-Ir(2) bond length. In the second Hf site, Hf(2) is bonded in a 6-coordinate geometry to two equivalent Ir(2) and four equivalent Ir(1) atoms. Both Hf(2)-Ir(2) bond lengths are 2.94 Å. There are two shorter (2.76 Å) and two longer (2.79 Å) Hf(2)-Ir(1) bond lengths. In the third Hf site, Hf(3) is bonded in a 6-coordinate geometry to two equivalent Ir(2) and four equivalent Ir(1) atoms. Both Hf(3)-Ir(2) bond lengths are 2.97 Å. There are two shorter (2.68 Å) and two longer (2.90 Å) Hf(3)-Ir(1) bond lengths. In the fourth Hf site, Hf(4) is bonded in a 5-coordinate geometry to one Ir(2) and four equivalent Ir(1) atoms. The Hf(4)-Ir(2) bond length is 2.92 Å. All Hf(4)-Ir(1) bond lengths are 2.71 Å. There are two inequivalent Ir sites. In the first Ir site, Ir(2) is bonded in a 9-coordinate geometry to one Hf(4), two equivalent Hf(2), two equivalent Hf(3), and four equivalent Hf(1) atoms. In the second Ir site, Ir(1) is bonded in a 8-coordinate geometry to two equivalent Hf(1), two equivalent Hf(2), two equivalent Hf(3), and two equivalent Hf(4) atoms.