Pr5B2C5 crystallizes in the tetragonal P4/ncc space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 7-coordinate geometry to two equivalent B(1), one C(2), and four equivalent C(1) atoms. In the second Pr site, Pr(2) is bonded to two equivalent C(2) and four equivalent C(1) atoms to form corner-sharing PrC6 octahedra. The corner-sharing octahedra are not tilted. B(1) is bonded in a linear geometry to four equivalent Pr(1) and two equivalent C(1) atoms. There are two inequivalent C sites. In the first C site, C(1) is bonded in a 6-coordinate geometry to one Pr(2), four equivalent Pr(1), and one B(1) atom. In the second C site, C(2) is bonded to two equivalent Pr(2) and four equivalent Pr(1) atoms to form corner-sharing CPr6 octahedra. The corner-sharing octahedra are not tilted.
Pr5B2C5 crystallizes in the tetragonal P4/ncc space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 7-coordinate geometry to two equivalent B(1), one C(2), and four equivalent C(1) atoms. There is one shorter (2.76 Å) and one longer (2.96 Å) Pr(1)-B(1) bond length. The Pr(1)-C(2) bond length is 2.62 Å. There are a spread of Pr(1)-C(1) bond distances ranging from 2.56-2.92 Å. In the second Pr site, Pr(2) is bonded to two equivalent C(2) and four equivalent C(1) atoms to form corner-sharing PrC6 octahedra. The corner-sharing octahedra are not tilted. There is one shorter (2.65 Å) and one longer (2.90 Å) Pr(2)-C(2) bond length. All Pr(2)-C(1) bond lengths are 2.77 Å. B(1) is bonded in a linear geometry to four equivalent Pr(1) and two equivalent C(1) atoms. Both B(1)-C(1) bond lengths are 1.47 Å. There are two inequivalent C sites. In the first C site, C(1) is bonded in a 6-coordinate geometry to one Pr(2), four equivalent Pr(1), and one B(1) atom. In the second C site, C(2) is bonded to two equivalent Pr(2) and four equivalent Pr(1) atoms to form corner-sharing CPr6 octahedra. The corner-sharing octahedra are not tilted.