La2Ir3Sb4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 17-coordinate geometry to two equivalent Ir(3), three equivalent Ir(1), three equivalent Ir(2), one Sb(2), two equivalent Sb(1), three equivalent Sb(3), and three equivalent Sb(4) atoms. In the second La site, La(2) is bonded in a 15-coordinate geometry to one Ir(1), two equivalent Ir(2), three equivalent Ir(3), one Sb(4), two equivalent Sb(3), three equivalent Sb(1), and three equivalent Sb(2) atoms. There are three inequivalent Ir sites. In the first Ir site, Ir(3) is bonded in a 10-coordinate geometry to two equivalent La(1), three equivalent La(2), one Sb(1), one Sb(3), one Sb(4), and two equivalent Sb(2) atoms. In the second Ir site, Ir(1) is bonded in a 8-coordinate geometry to one La(2), three equivalent La(1), one Sb(1), and three equivalent Sb(3) atoms. In the third Ir site, Ir(2) is bonded in a 5-coordinate geometry to two equivalent La(2), three equivalent La(1), one Sb(1), one Sb(2), and three equivalent Sb(4) atoms. There are four inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 7-coordinate geometry to two equivalent La(1), three equivalent La(2), one Ir(1), one Ir(2), and one Ir(3) atom. In the second Sb site, Sb(2) is bonded in a 7-coordinate geometry to one La(1), three equivalent La(2), one Ir(2), and two equivalent Ir(3) atoms. In the third Sb site, Sb(3) is bonded in a 8-coordinate geometry to two equivalent La(2), three equivalent La(1), one Ir(3), and three equivalent Ir(1) atoms. In the fourth Sb site, Sb(4) is bonded in a 8-coordinate geometry to one La(2), three equivalent La(1), one Ir(3), and three equivalent Ir(2) atoms.
La2Ir3Sb4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 17-coordinate geometry to two equivalent Ir(3), three equivalent Ir(1), three equivalent Ir(2), one Sb(2), two equivalent Sb(1), three equivalent Sb(3), and three equivalent Sb(4) atoms. Both La(1)-Ir(3) bond lengths are 3.71 Å. There is one shorter (3.25 Å) and two longer (3.48 Å) La(1)-Ir(1) bond lengths. There are two shorter (3.55 Å) and one longer (3.70 Å) La(1)-Ir(2) bond length. The La(1)-Sb(2) bond length is 3.65 Å. Both La(1)-Sb(1) bond lengths are 3.48 Å. There are two shorter (3.50 Å) and one longer (3.90 Å) La(1)-Sb(3) bond length. There are two shorter (3.37 Å) and one longer (3.56 Å) La(1)-Sb(4) bond length. In the second La site, La(2) is bonded in a 15-coordinate geometry to one Ir(1), two equivalent Ir(2), three equivalent Ir(3), one Sb(4), two equivalent Sb(3), three equivalent Sb(1), and three equivalent Sb(2) atoms. The La(2)-Ir(1) bond length is 3.46 Å. Both La(2)-Ir(2) bond lengths are 3.49 Å. There are two shorter (3.33 Å) and one longer (3.63 Å) La(2)-Ir(3) bond length. The La(2)-Sb(4) bond length is 3.35 Å. Both La(2)-Sb(3) bond lengths are 3.35 Å. There are two shorter (3.51 Å) and one longer (3.83 Å) La(2)-Sb(1) bond length. There are two shorter (3.30 Å) and one longer (3.37 Å) La(2)-Sb(2) bond length. There are three inequivalent Ir sites. In the first Ir site, Ir(3) is bonded in a 10-coordinate geometry to two equivalent La(1), three equivalent La(2), one Sb(1), one Sb(3), one Sb(4), and two equivalent Sb(2) atoms. The Ir(3)-Sb(1) bond length is 2.76 Å. The Ir(3)-Sb(3) bond length is 2.69 Å. The Ir(3)-Sb(4) bond length is 2.66 Å. Both Ir(3)-Sb(2) bond lengths are 2.65 Å. In the second Ir site, Ir(1) is bonded in a 8-coordinate geometry to one La(2), three equivalent La(1), one Sb(1), and three equivalent Sb(3) atoms. The Ir(1)-Sb(1) bond length is 2.62 Å. There is one shorter (2.66 Å) and two longer (2.67 Å) Ir(1)-Sb(3) bond lengths. In the third Ir site, Ir(2) is bonded in a 5-coordinate geometry to two equivalent La(2), three equivalent La(1), one Sb(1), one Sb(2), and three equivalent Sb(4) atoms. The Ir(2)-Sb(1) bond length is 2.61 Å. The Ir(2)-Sb(2) bond length is 2.70 Å. All Ir(2)-Sb(4) bond lengths are 2.64 Å. There are four inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 7-coordinate geometry to two equivalent La(1), three equivalent La(2), one Ir(1), one Ir(2), and one Ir(3) atom. In the second Sb site, Sb(2) is bonded in a 7-coordinate geometry to one La(1), three equivalent La(2), one Ir(2), and two equivalent Ir(3) atoms. In the third Sb site, Sb(3) is bonded in a 8-coordinate geometry to two equivalent La(2), three equivalent La(1), one Ir(3), and three equivalent Ir(1) atoms. In the fourth Sb site, Sb(4) is bonded in a 8-coordinate geometry to one La(2), three equivalent La(1), one Ir(3), and three equivalent Ir(2) atoms.