PrCo5P3 crystallizes in the orthorhombic Pnma space group. Pr(1) is bonded in a 17-coordinate geometry to one Co(1), one Co(5), three equivalent Co(2), three equivalent Co(3), three equivalent Co(4), two equivalent P(1), two equivalent P(2), and two equivalent P(3) atoms. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded in a 5-coordinate geometry to one Pr(1), one P(3), two equivalent P(1), and two equivalent P(2) atoms. In the second Co site, Co(2) is bonded in a 4-coordinate geometry to three equivalent Pr(1), one P(2), and three equivalent P(3) atoms. In the third Co site, Co(3) is bonded to three equivalent Pr(1), one P(1), one P(2), and two equivalent P(3) atoms to form distorted CoPr3P4 tetrahedra that share  a cornercorner with one Co(5)PrP4 tetrahedra, corners with three equivalent Co(4)Pr3P4 tetrahedra, corners with four equivalent Co(3)Pr3P4 tetrahedra, edges with two equivalent Co(3)Pr3P4 tetrahedra, edges with three equivalent Co(5)PrP4 tetrahedra, and faces with three equivalent Co(4)Pr3P4 tetrahedra. In the fourth Co site, Co(4) is bonded to three equivalent Pr(1), one P(1), one P(3), and two equivalent P(2) atoms to form distorted CoPr3P4 tetrahedra that share corners with two equivalent Co(5)PrP4 tetrahedra, corners with three equivalent Co(3)Pr3P4 tetrahedra, corners with four equivalent Co(4)Pr3P4 tetrahedra, edges with two equivalent Co(4)Pr3P4 tetrahedra, faces with two equivalent Co(5)PrP4 tetrahedra, and faces with three equivalent Co(3)Pr3P4 tetrahedra. In the fifth Co site, Co(5) is bonded to one Pr(1), one P(2), and three equivalent P(1) atoms to form distorted CoPrP4 tetrahedra that share  a cornercorner with one Co(3)Pr3P4 tetrahedra, corners with two equivalent Co(4)Pr3P4 tetrahedra, corners with two equivalent Co(5)PrP4 tetrahedra, edges with two equivalent Co(5)PrP4 tetrahedra, edges with three equivalent Co(3)Pr3P4 tetrahedra, and faces with two equivalent Co(4)Pr3P4 tetrahedra. There are three inequivalent P sites. In the first P site, P(3) is bonded in a 9-coordinate geometry to two equivalent Pr(1), one Co(1), one Co(4), two equivalent Co(3), and three equivalent Co(2) atoms. In the second P site, P(1) is bonded in a 9-coordinate geometry to two equivalent Pr(1), one Co(3), one Co(4), two equivalent Co(1), and three equivalent Co(5) atoms. In the third P site, P(2) is bonded in a 9-coordinate geometry to two equivalent Pr(1), one Co(2), one Co(3), one Co(5), two equivalent Co(1), and two equivalent Co(4) atoms.
PrCo5P3 crystallizes in the orthorhombic Pnma space group. Pr(1) is bonded in a 17-coordinate geometry to one Co(1), one Co(5), three equivalent Co(2), three equivalent Co(3), three equivalent Co(4), two equivalent P(1), two equivalent P(2), and two equivalent P(3) atoms. The Pr(1)-Co(1) bond length is 3.32 Å. The Pr(1)-Co(5) bond length is 3.00 Å. There are two shorter (2.91 Å) and one longer (3.10 Å) Pr(1)-Co(2) bond length. There are two shorter (3.12 Å) and one longer (3.16 Å) Pr(1)-Co(3) bond length. There are two shorter (3.03 Å) and one longer (3.11 Å) Pr(1)-Co(4) bond length. Both Pr(1)-P(1) bond lengths are 2.90 Å. Both Pr(1)-P(2) bond lengths are 2.85 Å. Both Pr(1)-P(3) bond lengths are 2.92 Å. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded in a 5-coordinate geometry to one Pr(1), one P(3), two equivalent P(1), and two equivalent P(2) atoms. The Co(1)-P(3) bond length is 2.21 Å. Both Co(1)-P(1) bond lengths are 2.55 Å. Both Co(1)-P(2) bond lengths are 2.54 Å. In the second Co site, Co(2) is bonded in a 4-coordinate geometry to three equivalent Pr(1), one P(2), and three equivalent P(3) atoms. The Co(2)-P(2) bond length is 2.37 Å. There are two shorter (2.30 Å) and one longer (2.39 Å) Co(2)-P(3) bond length. In the third Co site, Co(3) is bonded to three equivalent Pr(1), one P(1), one P(2), and two equivalent P(3) atoms to form distorted CoPr3P4 tetrahedra that share  a cornercorner with one Co(5)PrP4 tetrahedra, corners with three equivalent Co(4)Pr3P4 tetrahedra, corners with four equivalent Co(3)Pr3P4 tetrahedra, edges with two equivalent Co(3)Pr3P4 tetrahedra, edges with three equivalent Co(5)PrP4 tetrahedra, and faces with three equivalent Co(4)Pr3P4 tetrahedra. The Co(3)-P(1) bond length is 2.18 Å. The Co(3)-P(2) bond length is 2.26 Å. Both Co(3)-P(3) bond lengths are 2.34 Å. In the fourth Co site, Co(4) is bonded to three equivalent Pr(1), one P(1), one P(3), and two equivalent P(2) atoms to form distorted CoPr3P4 tetrahedra that share corners with two equivalent Co(5)PrP4 tetrahedra, corners with three equivalent Co(3)Pr3P4 tetrahedra, corners with four equivalent Co(4)Pr3P4 tetrahedra, edges with two equivalent Co(4)Pr3P4 tetrahedra, faces with two equivalent Co(5)PrP4 tetrahedra, and faces with three equivalent Co(3)Pr3P4 tetrahedra. The Co(4)-P(1) bond length is 2.28 Å. The Co(4)-P(3) bond length is 2.34 Å. Both Co(4)-P(2) bond lengths are 2.27 Å. In the fifth Co site, Co(5) is bonded to one Pr(1), one P(2), and three equivalent P(1) atoms to form distorted CoPrP4 tetrahedra that share  a cornercorner with one Co(3)Pr3P4 tetrahedra, corners with two equivalent Co(4)Pr3P4 tetrahedra, corners with two equivalent Co(5)PrP4 tetrahedra, edges with two equivalent Co(5)PrP4 tetrahedra, edges with three equivalent Co(3)Pr3P4 tetrahedra, and faces with two equivalent Co(4)Pr3P4 tetrahedra. The Co(5)-P(2) bond length is 2.13 Å. There is one shorter (2.14 Å) and two longer (2.25 Å) Co(5)-P(1) bond lengths. There are three inequivalent P sites. In the first P site, P(3) is bonded in a 9-coordinate geometry to two equivalent Pr(1), one Co(1), one Co(4), two equivalent Co(3), and three equivalent Co(2) atoms. In the second P site, P(1) is bonded in a 9-coordinate geometry to two equivalent Pr(1), one Co(3), one Co(4), two equivalent Co(1), and three equivalent Co(5) atoms. In the third P site, P(2) is bonded in a 9-coordinate geometry to two equivalent Pr(1), one Co(2), one Co(3), one Co(5), two equivalent Co(1), and two equivalent Co(4) atoms.