PrCo8P5 crystallizes in the orthorhombic Pmmn space group. Pr(1) is bonded in a 17-coordinate geometry to one Co(4), two equivalent Co(1), two equivalent Co(5), four equivalent Co(2), four equivalent P(1), and four equivalent P(2) atoms. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded to one Pr(1), one P(3), and three equivalent P(2) atoms to form distorted CoPrP4 tetrahedra that share corners with two equivalent Co(1)PrP4 tetrahedra, corners with three equivalent Co(2)Pr2P4 tetrahedra, edges with two equivalent Co(2)Pr2P4 tetrahedra, and edges with three equivalent Co(1)PrP4 tetrahedra. In the second Co site, Co(2) is bonded to two equivalent Pr(1), one P(2), and three equivalent P(1) atoms to form distorted CoPr2P4 tetrahedra that share corners with two equivalent Co(2)Pr2P4 tetrahedra, corners with three equivalent Co(1)PrP4 tetrahedra, edges with two equivalent Co(1)PrP4 tetrahedra, and edges with five equivalent Co(2)Pr2P4 tetrahedra. In the third Co site, Co(3) is bonded in a 5-coordinate geometry to one P(1), two equivalent P(2), and two equivalent P(3) atoms. In the fourth Co site, Co(4) is bonded in a 5-coordinate geometry to one Pr(1), one P(3), and four equivalent P(1) atoms. In the fifth Co site, Co(5) is bonded in a 4-coordinate geometry to two equivalent Pr(1), two equivalent P(2), and two equivalent P(3) atoms. There are three inequivalent P sites. In the first P site, P(1) is bonded in a 6-coordinate geometry to two equivalent Pr(1), one Co(3), two equivalent Co(4), and three equivalent Co(2) atoms. In the second P site, P(2) is bonded in a 9-coordinate geometry to two equivalent Pr(1), one Co(2), one Co(5), two equivalent Co(3), and three equivalent Co(1) atoms. In the third P site, P(3) is bonded in a 9-coordinate geometry to one Co(4), two equivalent Co(1), two equivalent Co(5), and four equivalent Co(3) atoms.
PrCo8P5 crystallizes in the orthorhombic Pmmn space group. Pr(1) is bonded in a 17-coordinate geometry to one Co(4), two equivalent Co(1), two equivalent Co(5), four equivalent Co(2), four equivalent P(1), and four equivalent P(2) atoms. The Pr(1)-Co(4) bond length is 3.03 Å. Both Pr(1)-Co(1) bond lengths are 3.29 Å. Both Pr(1)-Co(5) bond lengths are 3.12 Å. All Pr(1)-Co(2) bond lengths are 3.24 Å. All Pr(1)-P(1) bond lengths are 3.13 Å. All Pr(1)-P(2) bond lengths are 3.07 Å. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded to one Pr(1), one P(3), and three equivalent P(2) atoms to form distorted CoPrP4 tetrahedra that share corners with two equivalent Co(1)PrP4 tetrahedra, corners with three equivalent Co(2)Pr2P4 tetrahedra, edges with two equivalent Co(2)Pr2P4 tetrahedra, and edges with three equivalent Co(1)PrP4 tetrahedra. The Co(1)-P(3) bond length is 2.14 Å. There are two shorter (2.21 Å) and one longer (2.23 Å) Co(1)-P(2) bond length. In the second Co site, Co(2) is bonded to two equivalent Pr(1), one P(2), and three equivalent P(1) atoms to form distorted CoPr2P4 tetrahedra that share corners with two equivalent Co(2)Pr2P4 tetrahedra, corners with three equivalent Co(1)PrP4 tetrahedra, edges with two equivalent Co(1)PrP4 tetrahedra, and edges with five equivalent Co(2)Pr2P4 tetrahedra. The Co(2)-P(2) bond length is 2.21 Å. There is one shorter (2.16 Å) and two longer (2.24 Å) Co(2)-P(1) bond lengths. In the third Co site, Co(3) is bonded in a 5-coordinate geometry to one P(1), two equivalent P(2), and two equivalent P(3) atoms. The Co(3)-P(1) bond length is 2.19 Å. Both Co(3)-P(2) bond lengths are 2.49 Å. Both Co(3)-P(3) bond lengths are 2.44 Å. In the fourth Co site, Co(4) is bonded in a 5-coordinate geometry to one Pr(1), one P(3), and four equivalent P(1) atoms. The Co(4)-P(3) bond length is 2.16 Å. All Co(4)-P(1) bond lengths are 2.30 Å. In the fifth Co site, Co(5) is bonded in a 4-coordinate geometry to two equivalent Pr(1), two equivalent P(2), and two equivalent P(3) atoms. Both Co(5)-P(2) bond lengths are 2.27 Å. Both Co(5)-P(3) bond lengths are 2.31 Å. There are three inequivalent P sites. In the first P site, P(1) is bonded in a 6-coordinate geometry to two equivalent Pr(1), one Co(3), two equivalent Co(4), and three equivalent Co(2) atoms. In the second P site, P(2) is bonded in a 9-coordinate geometry to two equivalent Pr(1), one Co(2), one Co(5), two equivalent Co(3), and three equivalent Co(1) atoms. In the third P site, P(3) is bonded in a 9-coordinate geometry to one Co(4), two equivalent Co(1), two equivalent Co(5), and four equivalent Co(3) atoms.