Nd5Ge4 crystallizes in the orthorhombic Pnma space group. There are three inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 6-coordinate geometry to one Ge(3), two equivalent Ge(2), and three equivalent Ge(1) atoms. In the second Nd site, Nd(2) is bonded to one Ge(2), two equivalent Ge(3), and three equivalent Ge(1) atoms to form a mixture of distorted corner, face, and edge-sharing NdGe6 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 41-44°. In the third Nd site, Nd(3) is bonded to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms to form a mixture of corner and face-sharing NdGe6 octahedra. The corner-sharing octahedral tilt angles range from 55-56°. There are three inequivalent Ge sites. In the first Ge site, Ge(3) is bonded in a 9-coordinate geometry to two equivalent Nd(1), two equivalent Nd(3), four equivalent Nd(2), and one Ge(2) atom. In the second Ge site, Ge(1) is bonded in a 7-coordinate geometry to one Nd(3), three equivalent Nd(1), and three equivalent Nd(2) atoms. In the third Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Nd(2), two equivalent Nd(3), four equivalent Nd(1), and one Ge(3) atom.
Nd5Ge4 crystallizes in the orthorhombic Pnma space group. There are three inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 6-coordinate geometry to one Ge(3), two equivalent Ge(2), and three equivalent Ge(1) atoms. The Nd(1)-Ge(3) bond length is 3.15 Å. There is one shorter (3.14 Å) and one longer (3.23 Å) Nd(1)-Ge(2) bond length. There are a spread of Nd(1)-Ge(1) bond distances ranging from 3.00-3.09 Å. In the second Nd site, Nd(2) is bonded to one Ge(2), two equivalent Ge(3), and three equivalent Ge(1) atoms to form a mixture of distorted corner, face, and edge-sharing NdGe6 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 41-44°. The Nd(2)-Ge(2) bond length is 3.22 Å. There is one shorter (3.16 Å) and one longer (3.25 Å) Nd(2)-Ge(3) bond length. There are a spread of Nd(2)-Ge(1) bond distances ranging from 3.06-3.31 Å. In the third Nd site, Nd(3) is bonded to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms to form a mixture of corner and face-sharing NdGe6 octahedra. The corner-sharing octahedral tilt angles range from 55-56°. Both Nd(3)-Ge(1) bond lengths are 3.10 Å. There is one shorter (3.13 Å) and one longer (3.26 Å) Nd(3)-Ge(2) bond length. There is one shorter (3.13 Å) and one longer (3.24 Å) Nd(3)-Ge(3) bond length. There are three inequivalent Ge sites. In the first Ge site, Ge(3) is bonded in a 9-coordinate geometry to two equivalent Nd(1), two equivalent Nd(3), four equivalent Nd(2), and one Ge(2) atom. The Ge(3)-Ge(2) bond length is 2.68 Å. In the second Ge site, Ge(1) is bonded in a 7-coordinate geometry to one Nd(3), three equivalent Nd(1), and three equivalent Nd(2) atoms. In the third Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Nd(2), two equivalent Nd(3), four equivalent Nd(1), and one Ge(3) atom.