PrCo3P2 crystallizes in the orthorhombic Pmmn space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 16-coordinate geometry to two equivalent Co(2), two equivalent Co(6), six equivalent Co(5), two equivalent P(2), and four equivalent P(3) atoms. In the second Pr site, Pr(2) is bonded in a 15-coordinate geometry to one Co(3), one Co(5), two equivalent Co(2), two equivalent Co(6), three equivalent Co(4), two equivalent P(1), two equivalent P(3), and two equivalent P(4) atoms. There are six inequivalent Co sites. In the first Co site, Co(1) is bonded in a 5-coordinate geometry to one P(2) and four equivalent P(4) atoms. In the second Co site, Co(2) is bonded in a 9-coordinate geometry to two equivalent Pr(1), four equivalent Pr(2), one P(1), and two equivalent P(3) atoms. In the third Co site, Co(3) is bonded to two equivalent Pr(2), two equivalent P(1), and two equivalent P(4) atoms to form distorted CoPr2P4 tetrahedra that share corners with two equivalent Co(3)Pr2P4 tetrahedra, corners with six equivalent Co(6)Pr3P4 tetrahedra, edges with two equivalent Co(4)Pr3P4 tetrahedra, and faces with four equivalent Co(4)Pr3P4 tetrahedra. In the fourth Co site, Co(4) is bonded to three equivalent Pr(2), one P(1), and three equivalent P(4) atoms to form distorted CoPr3P4 tetrahedra that share  a cornercorner with one Co(4)Pr3P4 tetrahedra, corners with two equivalent Co(6)Pr3P4 tetrahedra,  an edgeedge with one Co(3)Pr2P4 tetrahedra, edges with two equivalent Co(4)Pr3P4 tetrahedra, edges with two equivalent Co(6)Pr3P4 tetrahedra,  a faceface with one Co(6)Pr3P4 tetrahedra, faces with two equivalent Co(3)Pr2P4 tetrahedra, and faces with two equivalent Co(4)Pr3P4 tetrahedra. In the fifth Co site, Co(5) is bonded in a 4-coordinate geometry to one Pr(2), three equivalent Pr(1), one P(2), and three equivalent P(3) atoms. In the sixth Co site, Co(6) is bonded to one Pr(1), two equivalent Pr(2), one P(3), one P(4), and two equivalent P(2) atoms to form distorted CoPr3P4 tetrahedra that share corners with two equivalent Co(4)Pr3P4 tetrahedra, corners with two equivalent Co(6)Pr3P4 tetrahedra, corners with three equivalent Co(3)Pr2P4 tetrahedra, edges with two equivalent Co(4)Pr3P4 tetrahedra, edges with two equivalent Co(6)Pr3P4 tetrahedra,  a faceface with one Co(4)Pr3P4 tetrahedra, and  a faceface with one Co(6)Pr3P4 tetrahedra. There are four inequivalent P sites. In the first P site, P(4) is bonded in a 9-coordinate geometry to two equivalent Pr(2), one Co(3), one Co(6), two equivalent Co(1), and three equivalent Co(4) atoms. In the second P site, P(1) is bonded in a 9-coordinate geometry to four equivalent Pr(2), one Co(2), two equivalent Co(3), and two equivalent Co(4) atoms. In the third P site, P(2) is bonded in a 9-coordinate geometry to two equivalent Pr(1), one Co(1), two equivalent Co(5), and four equivalent Co(6) atoms. In the fourth P site, P(3) is bonded in a 9-coordinate geometry to two equivalent Pr(1), two equivalent Pr(2), one Co(2), one Co(6), and three equivalent Co(5) atoms.
PrCo3P2 crystallizes in the orthorhombic Pmmn space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 16-coordinate geometry to two equivalent Co(2), two equivalent Co(6), six equivalent Co(5), two equivalent P(2), and four equivalent P(3) atoms. Both Pr(1)-Co(2) bond lengths are 2.96 Å. Both Pr(1)-Co(6) bond lengths are 3.14 Å. There are four shorter (3.09 Å) and two longer (3.22 Å) Pr(1)-Co(5) bond lengths. Both Pr(1)-P(2) bond lengths are 2.95 Å. All Pr(1)-P(3) bond lengths are 3.04 Å. In the second Pr site, Pr(2) is bonded in a 15-coordinate geometry to one Co(3), one Co(5), two equivalent Co(2), two equivalent Co(6), three equivalent Co(4), two equivalent P(1), two equivalent P(3), and two equivalent P(4) atoms. The Pr(2)-Co(3) bond length is 3.10 Å. The Pr(2)-Co(5) bond length is 3.04 Å. Both Pr(2)-Co(2) bond lengths are 2.94 Å. Both Pr(2)-Co(6) bond lengths are 3.02 Å. There is one shorter (3.05 Å) and two longer (3.15 Å) Pr(2)-Co(4) bond lengths. Both Pr(2)-P(1) bond lengths are 2.96 Å. Both Pr(2)-P(3) bond lengths are 2.93 Å. Both Pr(2)-P(4) bond lengths are 2.88 Å. There are six inequivalent Co sites. In the first Co site, Co(1) is bonded in a 5-coordinate geometry to one P(2) and four equivalent P(4) atoms. The Co(1)-P(2) bond length is 2.25 Å. All Co(1)-P(4) bond lengths are 2.57 Å. In the second Co site, Co(2) is bonded in a 9-coordinate geometry to two equivalent Pr(1), four equivalent Pr(2), one P(1), and two equivalent P(3) atoms. The Co(2)-P(1) bond length is 2.25 Å. Both Co(2)-P(3) bond lengths are 2.38 Å. In the third Co site, Co(3) is bonded to two equivalent Pr(2), two equivalent P(1), and two equivalent P(4) atoms to form distorted CoPr2P4 tetrahedra that share corners with two equivalent Co(3)Pr2P4 tetrahedra, corners with six equivalent Co(6)Pr3P4 tetrahedra, edges with two equivalent Co(4)Pr3P4 tetrahedra, and faces with four equivalent Co(4)Pr3P4 tetrahedra. Both Co(3)-P(1) bond lengths are 2.26 Å. Both Co(3)-P(4) bond lengths are 2.17 Å. In the fourth Co site, Co(4) is bonded to three equivalent Pr(2), one P(1), and three equivalent P(4) atoms to form distorted CoPr3P4 tetrahedra that share  a cornercorner with one Co(4)Pr3P4 tetrahedra, corners with two equivalent Co(6)Pr3P4 tetrahedra,  an edgeedge with one Co(3)Pr2P4 tetrahedra, edges with two equivalent Co(4)Pr3P4 tetrahedra, edges with two equivalent Co(6)Pr3P4 tetrahedra,  a faceface with one Co(6)Pr3P4 tetrahedra, faces with two equivalent Co(3)Pr2P4 tetrahedra, and faces with two equivalent Co(4)Pr3P4 tetrahedra. The Co(4)-P(1) bond length is 2.24 Å. All Co(4)-P(4) bond lengths are 2.32 Å. In the fifth Co site, Co(5) is bonded in a 4-coordinate geometry to one Pr(2), three equivalent Pr(1), one P(2), and three equivalent P(3) atoms. The Co(5)-P(2) bond length is 2.45 Å. There are two shorter (2.25 Å) and one longer (2.28 Å) Co(5)-P(3) bond length. In the sixth Co site, Co(6) is bonded to one Pr(1), two equivalent Pr(2), one P(3), one P(4), and two equivalent P(2) atoms to form distorted CoPr3P4 tetrahedra that share corners with two equivalent Co(4)Pr3P4 tetrahedra, corners with two equivalent Co(6)Pr3P4 tetrahedra, corners with three equivalent Co(3)Pr2P4 tetrahedra, edges with two equivalent Co(4)Pr3P4 tetrahedra, edges with two equivalent Co(6)Pr3P4 tetrahedra,  a faceface with one Co(4)Pr3P4 tetrahedra, and  a faceface with one Co(6)Pr3P4 tetrahedra. The Co(6)-P(3) bond length is 2.33 Å. The Co(6)-P(4) bond length is 2.33 Å. Both Co(6)-P(2) bond lengths are 2.35 Å. There are four inequivalent P sites. In the first P site, P(4) is bonded in a 9-coordinate geometry to two equivalent Pr(2), one Co(3), one Co(6), two equivalent Co(1), and three equivalent Co(4) atoms. In the second P site, P(1) is bonded in a 9-coordinate geometry to four equivalent Pr(2), one Co(2), two equivalent Co(3), and two equivalent Co(4) atoms. In the third P site, P(2) is bonded in a 9-coordinate geometry to two equivalent Pr(1), one Co(1), two equivalent Co(5), and four equivalent Co(6) atoms. In the fourth P site, P(3) is bonded in a 9-coordinate geometry to two equivalent Pr(1), two equivalent Pr(2), one Co(2), one Co(6), and three equivalent Co(5) atoms.