Ir2Si is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Ir sites. In the first Ir site, Ir(2) is bonded in a 3-coordinate geometry to five equivalent Si(1) atoms. In the second Ir site, Ir(1) is bonded in a 4-coordinate geometry to five equivalent Si(1) atoms. Si(1) is bonded in a 10-coordinate geometry to five equivalent Ir(1) and five equivalent Ir(2) atoms.
Ir2Si is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Ir sites. In the first Ir site, Ir(2) is bonded in a 3-coordinate geometry to five equivalent Si(1) atoms. There are a spread of Ir(2)-Si(1) bond distances ranging from 2.46-2.89 Å. In the second Ir site, Ir(1) is bonded in a 4-coordinate geometry to five equivalent Si(1) atoms. There are a spread of Ir(1)-Si(1) bond distances ranging from 2.41-2.89 Å. Si(1) is bonded in a 10-coordinate geometry to five equivalent Ir(1) and five equivalent Ir(2) atoms.