Pr5Ge4 crystallizes in the orthorhombic Pnma space group. There are three inequivalent Pr sites. In the first Pr site, Pr(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 Pr site, Pr(2) is bonded in a 6-coordinate geometry to one Ge(2), two equivalent Ge(3), and four equivalent Ge(1) atoms. In the third Pr site, Pr(3) is bonded to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms to form corner-sharing PrGe6 octahedra. The corner-sharing octahedral tilt angles range from 54-56°. There are three inequivalent Ge sites. In the first Ge site, Ge(3) is bonded in a 9-coordinate geometry to two equivalent Pr(1), two equivalent Pr(3), four equivalent Pr(2), and one Ge(2) atom. In the second Ge site, Ge(1) is bonded in a 8-coordinate geometry to one Pr(3), three equivalent Pr(1), and four equivalent Pr(2) atoms. In the third Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Pr(2), two equivalent Pr(3), four equivalent Pr(1), and one Ge(3) atom.
Pr5Ge4 crystallizes in the orthorhombic Pnma space group. There are three inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 6-coordinate geometry to one Ge(3), two equivalent Ge(2), and three equivalent Ge(1) atoms. The Pr(1)-Ge(3) bond length is 3.19 Å. There is one shorter (3.15 Å) and one longer (3.27 Å) Pr(1)-Ge(2) bond length. There are a spread of Pr(1)-Ge(1) bond distances ranging from 3.00-3.12 Å. In the second Pr site, Pr(2) is bonded in a 6-coordinate geometry to one Ge(2), two equivalent Ge(3), and four equivalent Ge(1) atoms. The Pr(2)-Ge(2) bond length is 3.29 Å. There is one shorter (3.17 Å) and one longer (3.32 Å) Pr(2)-Ge(3) bond length. There are a spread of Pr(2)-Ge(1) bond distances ranging from 3.10-3.82 Å. In the third Pr site, Pr(3) is bonded to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms to form corner-sharing PrGe6 octahedra. The corner-sharing octahedral tilt angles range from 54-56°. Both Pr(3)-Ge(1) bond lengths are 3.16 Å. There is one shorter (3.12 Å) and one longer (3.31 Å) Pr(3)-Ge(2) bond length. There is one shorter (3.13 Å) and one longer (3.32 Å) Pr(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 Pr(1), two equivalent Pr(3), four equivalent Pr(2), and one Ge(2) atom. The Ge(3)-Ge(2) bond length is 2.72 Å. In the second Ge site, Ge(1) is bonded in a 8-coordinate geometry to one Pr(3), three equivalent Pr(1), and four equivalent Pr(2) atoms. In the third Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Pr(2), two equivalent Pr(3), four equivalent Pr(1), and one Ge(3) atom.