Gd5Ge4 crystallizes in the orthorhombic Pnma space group. There are three inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 7-coordinate geometry to one Ge(2), two equivalent Ge(3), and four equivalent Ge(1) atoms. In the second Gd site, Gd(2) is bonded in a 6-coordinate geometry to one Ge(3), two equivalent Ge(2), and three equivalent Ge(1) atoms. In the third Gd site, Gd(3) is bonded to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms to form corner-sharing GdGe6 octahedra. The corner-sharing octahedral tilt angles range from 53-55°. There are three inequivalent Ge sites. In the first Ge site, Ge(3) is bonded in a 9-coordinate geometry to two equivalent Gd(2), two equivalent Gd(3), four equivalent Gd(1), and one Ge(2) atom. In the second Ge site, Ge(1) is bonded in a 8-coordinate geometry to one Gd(3), three equivalent Gd(2), and four equivalent Gd(1) atoms. In the third Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Gd(1), two equivalent Gd(3), four equivalent Gd(2), and one Ge(3) atom.
Gd5Ge4 crystallizes in the orthorhombic Pnma space group. There are three inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 7-coordinate geometry to one Ge(2), two equivalent Ge(3), and four equivalent Ge(1) atoms. The Gd(1)-Ge(2) bond length is 3.23 Å. There is one shorter (3.09 Å) and one longer (3.25 Å) Gd(1)-Ge(3) bond length. There are a spread of Gd(1)-Ge(1) bond distances ranging from 3.01-3.64 Å. In the second Gd site, Gd(2) is bonded in a 6-coordinate geometry to one Ge(3), two equivalent Ge(2), and three equivalent Ge(1) atoms. The Gd(2)-Ge(3) bond length is 3.08 Å. There is one shorter (3.05 Å) and one longer (3.10 Å) Gd(2)-Ge(2) bond length. There are a spread of Gd(2)-Ge(1) bond distances ranging from 2.90-3.02 Å. In the third Gd site, Gd(3) is bonded to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms to form corner-sharing GdGe6 octahedra. The corner-sharing octahedral tilt angles range from 53-55°. Both Gd(3)-Ge(1) bond lengths are 3.09 Å. There is one shorter (3.02 Å) and one longer (3.19 Å) Gd(3)-Ge(2) bond length. There is one shorter (3.01 Å) and one longer (3.15 Å) Gd(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 Gd(2), two equivalent Gd(3), four equivalent Gd(1), and one Ge(2) atom. The Ge(3)-Ge(2) bond length is 2.69 Å. In the second Ge site, Ge(1) is bonded in a 8-coordinate geometry to one Gd(3), three equivalent Gd(2), and four equivalent Gd(1) atoms. In the third Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Gd(1), two equivalent Gd(3), four equivalent Gd(2), and one Ge(3) atom.