Nd2IrGe2 crystallizes in the monoclinic C2/m space group. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 9-coordinate geometry to three equivalent Ir(1), three equivalent Ge(1), and three equivalent Ge(2) atoms. In the second Nd site, Nd(2) is bonded in a 3-coordinate geometry to one Ir(1) and five equivalent Ge(1) atoms. Ir(1) is bonded in a 8-coordinate geometry to one Nd(2), three equivalent Nd(1), two equivalent Ge(1), and two equivalent Ge(2) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 10-coordinate geometry to three equivalent Nd(1), five equivalent Nd(2), and two equivalent Ir(1) atoms. In the second Ge site, Ge(2) is bonded in a 6-coordinate geometry to three equivalent Nd(1), two equivalent Ir(1), and one Ge(2) atom.
Nd2IrGe2 crystallizes in the monoclinic C2/m space group. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 9-coordinate geometry to three equivalent Ir(1), three equivalent Ge(1), and three equivalent Ge(2) atoms. There are two shorter (3.15 Å) and one longer (3.27 Å) Nd(1)-Ir(1) bond length. There is one shorter (3.38 Å) and two longer (3.48 Å) Nd(1)-Ge(1) bond lengths. There is one shorter (2.91 Å) and two longer (3.04 Å) Nd(1)-Ge(2) bond lengths. In the second Nd site, Nd(2) is bonded in a 3-coordinate geometry to one Ir(1) and five equivalent Ge(1) atoms. The Nd(2)-Ir(1) bond length is 2.96 Å. There are a spread of Nd(2)-Ge(1) bond distances ranging from 3.11-3.55 Å. Ir(1) is bonded in a 8-coordinate geometry to one Nd(2), three equivalent Nd(1), two equivalent Ge(1), and two equivalent Ge(2) atoms. Both Ir(1)-Ge(1) bond lengths are 2.53 Å. There is one shorter (2.51 Å) and one longer (2.55 Å) Ir(1)-Ge(2) bond length. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 10-coordinate geometry to three equivalent Nd(1), five equivalent Nd(2), and two equivalent Ir(1) atoms. In the second Ge site, Ge(2) is bonded in a 6-coordinate geometry to three equivalent Nd(1), two equivalent Ir(1), and one Ge(2) atom. The Ge(2)-Ge(2) bond length is 2.58 Å.