Pr3IrI3 is Ilmenite-like structured and crystallizes in the cubic I4_132 space group. Pr(1) is bonded to two equivalent Ir(1) and four equivalent I(1) atoms to form a mixture of distorted corner and edge-sharing PrIr2I4 octahedra. The corner-sharing octahedral tilt angles range from 8-12°. Ir(1) is bonded to six equivalent Pr(1) atoms to form edge-sharing IrPr6 octahedra. I(1) is bonded in a distorted rectangular see-saw-like geometry to four equivalent Pr(1) atoms.
Pr3IrI3 is Ilmenite-like structured and crystallizes in the cubic I4_132 space group. Pr(1) is bonded to two equivalent Ir(1) and four equivalent I(1) atoms to form a mixture of distorted corner and edge-sharing PrIr2I4 octahedra. The corner-sharing octahedral tilt angles range from 8-12°. Both Pr(1)-Ir(1) bond lengths are 2.88 Å. There are two shorter (3.29 Å) and two longer (3.44 Å) Pr(1)-I(1) bond lengths. Ir(1) is bonded to six equivalent Pr(1) atoms to form edge-sharing IrPr6 octahedra. I(1) is bonded in a distorted rectangular see-saw-like geometry to four equivalent Pr(1) atoms.