Lu2(IrAl3)3 crystallizes in the orthorhombic Cmcm space group. Lu(1) is bonded in a 17-coordinate geometry to two equivalent Ir(2), four equivalent Ir(1), one Al(1), two equivalent Al(3), two equivalent Al(4), and six equivalent Al(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 Lu(1), two equivalent Al(3), two equivalent Al(4), and four equivalent Al(2) atoms. In the second Ir site, Ir(2) is bonded in a 8-coordinate geometry to four equivalent Lu(1), two equivalent Al(1), two equivalent Al(3), and four equivalent Al(2) atoms. There are four inequivalent Al sites. In the first Al site, Al(1) is bonded in a 2-coordinate geometry to two equivalent Lu(1) and two equivalent Ir(2) atoms. In the second Al site, Al(2) is bonded in a 3-coordinate geometry to three equivalent Lu(1), one Ir(2), and two equivalent Ir(1) atoms. In the third Al site, Al(3) is bonded in a 3-coordinate geometry to two equivalent Lu(1), one Ir(2), and two equivalent Ir(1) atoms. In the fourth Al site, Al(4) is bonded in a 2-coordinate geometry to two equivalent Lu(1) and two equivalent Ir(1) atoms.
Lu2(IrAl3)3 crystallizes in the orthorhombic Cmcm space group. Lu(1) is bonded in a 17-coordinate geometry to two equivalent Ir(2), four equivalent Ir(1), one Al(1), two equivalent Al(3), two equivalent Al(4), and six equivalent Al(2) atoms. Both Lu(1)-Ir(2) bond lengths are 3.37 Å. There are two shorter (3.41 Å) and two longer (3.43 Å) Lu(1)-Ir(1) bond lengths. The Lu(1)-Al(1) bond length is 3.05 Å. Both Lu(1)-Al(3) bond lengths are 3.05 Å. There is one shorter (3.02 Å) and one longer (3.13 Å) Lu(1)-Al(4) bond length. There are a spread of Lu(1)-Al(2) bond distances ranging from 3.00-3.04 Å. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 8-coordinate geometry to four equivalent Lu(1), two equivalent Al(3), two equivalent Al(4), and four equivalent Al(2) atoms. Both Ir(1)-Al(3) bond lengths are 2.60 Å. Both Ir(1)-Al(4) bond lengths are 2.53 Å. There are two shorter (2.52 Å) and two longer (2.59 Å) Ir(1)-Al(2) bond lengths. In the second Ir site, Ir(2) is bonded in a 8-coordinate geometry to four equivalent Lu(1), two equivalent Al(1), two equivalent Al(3), and four equivalent Al(2) atoms. Both Ir(2)-Al(1) bond lengths are 2.53 Å. Both Ir(2)-Al(3) bond lengths are 2.56 Å. All Ir(2)-Al(2) bond lengths are 2.60 Å. There are four inequivalent Al sites. In the first Al site, Al(1) is bonded in a 2-coordinate geometry to two equivalent Lu(1) and two equivalent Ir(2) atoms. In the second Al site, Al(2) is bonded in a 3-coordinate geometry to three equivalent Lu(1), one Ir(2), and two equivalent Ir(1) atoms. In the third Al site, Al(3) is bonded in a 3-coordinate geometry to two equivalent Lu(1), one Ir(2), and two equivalent Ir(1) atoms. In the fourth Al site, Al(4) is bonded in a 2-coordinate geometry to two equivalent Lu(1) and two equivalent Ir(1) atoms.