Ir3Si crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a distorted square co-planar geometry to four equivalent Si(1) atoms. In the second Ir site, Ir(2) is bonded in a distorted water-like geometry to two equivalent Si(1) atoms. Si(1) is bonded in a 8-coordinate geometry to four equivalent Ir(1) and four equivalent Ir(2) atoms.
Ir3Si crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a distorted square co-planar geometry to four equivalent Si(1) atoms. All Ir(1)-Si(1) bond lengths are 2.63 Å. In the second Ir site, Ir(2) is bonded in a distorted water-like geometry to two equivalent Si(1) atoms. Both Ir(2)-Si(1) bond lengths are 2.42 Å. Si(1) is bonded in a 8-coordinate geometry to four equivalent Ir(1) and four equivalent Ir(2) atoms.