Yb3Ir3Ga8 crystallizes in the orthorhombic Immm space group. There are two inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 16-coordinate geometry to four equivalent Ir(2), four equivalent Ga(1), and eight equivalent Ga(2) atoms. In the second Yb site, Yb(2) is bonded in a 12-coordinate geometry to two equivalent Ir(1), two equivalent Ir(2), four equivalent Ga(1), and four equivalent Ga(2) atoms. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 8-coordinate geometry to four equivalent Yb(2) and four equivalent Ga(1) atoms. In the second Ir site, Ir(2) is bonded in a 8-coordinate geometry to two equivalent Yb(1), two equivalent Yb(2), two equivalent Ga(2), and four equivalent Ga(1) atoms. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to one Yb(1), two equivalent Yb(2), one Ir(1), two equivalent Ir(2), and three equivalent Ga(2) atoms. In the second Ga site, Ga(2) is bonded in a 1-coordinate geometry to two equivalent Yb(1), two equivalent Yb(2), one Ir(2), and three equivalent Ga(1) atoms.
Yb3Ir3Ga8 crystallizes in the orthorhombic Immm space group. There are two inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 16-coordinate geometry to four equivalent Ir(2), four equivalent Ga(1), and eight equivalent Ga(2) atoms. All Yb(1)-Ir(2) bond lengths are 3.44 Å. All Yb(1)-Ga(1) bond lengths are 3.20 Å. All Yb(1)-Ga(2) bond lengths are 3.28 Å. In the second Yb site, Yb(2) is bonded in a 12-coordinate geometry to two equivalent Ir(1), two equivalent Ir(2), four equivalent Ga(1), and four equivalent Ga(2) atoms. Both Yb(2)-Ir(1) bond lengths are 3.05 Å. Both Yb(2)-Ir(2) bond lengths are 3.07 Å. All Yb(2)-Ga(1) bond lengths are 3.02 Å. All Yb(2)-Ga(2) bond lengths are 3.19 Å. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 8-coordinate geometry to four equivalent Yb(2) and four equivalent Ga(1) atoms. All Ir(1)-Ga(1) bond lengths are 2.56 Å. In the second Ir site, Ir(2) is bonded in a 8-coordinate geometry to two equivalent Yb(1), two equivalent Yb(2), two equivalent Ga(2), and four equivalent Ga(1) atoms. Both Ir(2)-Ga(2) bond lengths are 2.54 Å. All Ir(2)-Ga(1) bond lengths are 2.62 Å. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to one Yb(1), two equivalent Yb(2), one Ir(1), two equivalent Ir(2), and three equivalent Ga(2) atoms. There are two shorter (2.66 Å) and one longer (2.74 Å) Ga(1)-Ga(2) bond length. In the second Ga site, Ga(2) is bonded in a 1-coordinate geometry to two equivalent Yb(1), two equivalent Yb(2), one Ir(2), and three equivalent Ga(1) atoms.