PrIr3Si2 crystallizes in the orthorhombic Imma space group. Pr(1) is bonded in a 20-coordinate geometry to two equivalent Pr(1), four equivalent Ir(1), eight equivalent Ir(2), and six equivalent Si(1) atoms. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 4-coordinate geometry to four equivalent Pr(1) and four equivalent Si(1) atoms. In the second Ir site, Ir(2) is bonded in a 6-coordinate geometry to four equivalent Pr(1) and four equivalent Si(1) atoms. Si(1) is bonded in a 6-coordinate geometry to three equivalent Pr(1), two equivalent Ir(1), and four equivalent Ir(2) atoms.
PrIr3Si2 crystallizes in the orthorhombic Imma space group. Pr(1) is bonded in a 20-coordinate geometry to two equivalent Pr(1), four equivalent Ir(1), eight equivalent Ir(2), and six equivalent Si(1) atoms. Both Pr(1)-Pr(1) bond lengths are 3.61 Å. There are two shorter (3.21 Å) and two longer (3.48 Å) Pr(1)-Ir(1) bond lengths. There are four shorter (3.17 Å) and four longer (3.54 Å) Pr(1)-Ir(2) bond lengths. There are a spread of Pr(1)-Si(1) bond distances ranging from 3.18-3.37 Å. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 4-coordinate geometry to four equivalent Pr(1) and four equivalent Si(1) atoms. All Ir(1)-Si(1) bond lengths are 2.47 Å. In the second Ir site, Ir(2) is bonded in a 6-coordinate geometry to four equivalent Pr(1) and four equivalent Si(1) atoms. There are two shorter (2.43 Å) and two longer (2.44 Å) Ir(2)-Si(1) bond lengths. Si(1) is bonded in a 6-coordinate geometry to three equivalent Pr(1), two equivalent Ir(1), and four equivalent Ir(2) atoms.