Y2Ir3Si5 crystallizes in the orthorhombic Ibam space group. Y(1) is bonded in a 17-coordinate geometry to two equivalent Ir(1), five equivalent Ir(2), two equivalent Si(1), four equivalent Si(2), and four equivalent Si(3) atoms. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 6-coordinate geometry to four equivalent Y(1), two equivalent Si(2), and four equivalent Si(3) atoms. In the second Ir site, Ir(2) is bonded in a 5-coordinate geometry to five equivalent Y(1), one Si(3), two equivalent Si(1), and two equivalent Si(2) atoms. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 8-coordinate geometry to four equivalent Y(1) and four equivalent Ir(2) atoms. In the second Si site, Si(2) is bonded in a 3-coordinate geometry to four equivalent Y(1), one Ir(1), two equivalent Ir(2), and two equivalent Si(3) atoms. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to four equivalent Y(1), one Ir(2), two equivalent Ir(1), and two equivalent Si(2) atoms.
Y2Ir3Si5 crystallizes in the orthorhombic Ibam space group. Y(1) is bonded in a 17-coordinate geometry to two equivalent Ir(1), five equivalent Ir(2), two equivalent Si(1), four equivalent Si(2), and four equivalent Si(3) atoms. Both Y(1)-Ir(1) bond lengths are 3.41 Å. There are a spread of Y(1)-Ir(2) bond distances ranging from 3.06-3.43 Å. Both Y(1)-Si(1) bond lengths are 3.11 Å. There are two shorter (3.18 Å) and two longer (3.26 Å) Y(1)-Si(2) bond lengths. There are a spread of Y(1)-Si(3) bond distances ranging from 2.95-3.15 Å. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 6-coordinate geometry to four equivalent Y(1), two equivalent Si(2), and four equivalent Si(3) atoms. Both Ir(1)-Si(2) bond lengths are 2.59 Å. All Ir(1)-Si(3) bond lengths are 2.46 Å. In the second Ir site, Ir(2) is bonded in a 5-coordinate geometry to five equivalent Y(1), one Si(3), two equivalent Si(1), and two equivalent Si(2) atoms. The Ir(2)-Si(3) bond length is 2.34 Å. Both Ir(2)-Si(1) bond lengths are 2.45 Å. Both Ir(2)-Si(2) bond lengths are 2.41 Å. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 8-coordinate geometry to four equivalent Y(1) and four equivalent Ir(2) atoms. In the second Si site, Si(2) is bonded in a 3-coordinate geometry to four equivalent Y(1), one Ir(1), two equivalent Ir(2), and two equivalent Si(3) atoms. Both Si(2)-Si(3) bond lengths are 2.53 Å. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to four equivalent Y(1), one Ir(2), two equivalent Ir(1), and two equivalent Si(2) atoms.