Nd2(IrSi)3 crystallizes in the tetragonal P4/mmm space group. Nd(1) is bonded to four equivalent Nd(1), one Ir(1), and one Si(1) atom to form a mixture of distorted edge and corner-sharing NdNd4SiIr octahedra. The corner-sharing octahedra are not tilted. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a distorted linear geometry to one Nd(1) and one Si(2) atom. In the second Ir site, Ir(2) is bonded in a distorted linear geometry to two equivalent Si(1) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a distorted linear geometry to one Nd(1) and one Ir(2) atom. In the second Si site, Si(2) is bonded in a linear geometry to two equivalent Ir(1) atoms.
Nd2(IrSi)3 crystallizes in the tetragonal P4/mmm space group. Nd(1) is bonded to four equivalent Nd(1), one Ir(1), and one Si(1) atom to form a mixture of distorted edge and corner-sharing NdNd4SiIr octahedra. The corner-sharing octahedra are not tilted. All Nd(1)-Nd(1) bond lengths are 2.83 Å. The Nd(1)-Ir(1) bond length is 2.72 Å. The Nd(1)-Si(1) bond length is 3.08 Å. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a distorted linear geometry to one Nd(1) and one Si(2) atom. The Ir(1)-Si(2) bond length is 2.24 Å. In the second Ir site, Ir(2) is bonded in a distorted linear geometry to two equivalent Si(1) atoms. Both Ir(2)-Si(1) bond lengths are 2.31 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a distorted linear geometry to one Nd(1) and one Ir(2) atom. In the second Si site, Si(2) is bonded in a linear geometry to two equivalent Ir(1) atoms.