Pr7Ir3 crystallizes in the hexagonal P6_3mc space group. There are three inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a distorted trigonal non-coplanar geometry to three equivalent Ir(1) atoms. In the second Pr site, Pr(3) is bonded in a distorted water-like geometry to two equivalent Ir(1) atoms. In the third Pr site, Pr(2) is bonded in a 3-coordinate geometry to three equivalent Ir(1) atoms. Ir(1) is bonded in a 6-coordinate geometry to one Pr(1), two equivalent Pr(3), and three equivalent Pr(2) atoms.
Pr7Ir3 crystallizes in the hexagonal P6_3mc space group. There are three inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a distorted trigonal non-coplanar geometry to three equivalent Ir(1) atoms. All Pr(1)-Ir(1) bond lengths are 2.93 Å. In the second Pr site, Pr(3) is bonded in a distorted water-like geometry to two equivalent Ir(1) atoms. Both Pr(3)-Ir(1) bond lengths are 2.90 Å. In the third Pr site, Pr(2) is bonded in a 3-coordinate geometry to three equivalent Ir(1) atoms. There are two shorter (2.94 Å) and one longer (3.08 Å) Pr(2)-Ir(1) bond length. Ir(1) is bonded in a 6-coordinate geometry to one Pr(1), two equivalent Pr(3), and three equivalent Pr(2) atoms.