TbCo3P2 crystallizes in the orthorhombic Pmmn space group. There are two inequivalent Tb sites. In the first Tb site, Tb(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 Tb site, Tb(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 Tb(1), four equivalent Tb(2), one P(1), and two equivalent P(3) atoms. In the third Co site, Co(3) is bonded to two equivalent Tb(2), two equivalent P(1), and two equivalent P(4) atoms to form distorted CoTb2P4 tetrahedra that share corners with two equivalent Co(3)Tb2P4 tetrahedra, corners with two equivalent Co(5)Tb4P4 tetrahedra, corners with six equivalent Co(6)Tb3P4 tetrahedra, edges with two equivalent Co(4)Tb3P4 tetrahedra, and faces with four equivalent Co(4)Tb3P4 tetrahedra. In the fourth Co site, Co(4) is bonded to three equivalent Tb(2), one P(1), and three equivalent P(4) atoms to form distorted CoTb3P4 tetrahedra that share  a cornercorner with one Co(4)Tb3P4 tetrahedra, corners with two equivalent Co(6)Tb3P4 tetrahedra, corners with three equivalent Co(5)Tb4P4 tetrahedra,  an edgeedge with one Co(3)Tb2P4 tetrahedra, edges with two equivalent Co(4)Tb3P4 tetrahedra, edges with two equivalent Co(6)Tb3P4 tetrahedra,  a faceface with one Co(6)Tb3P4 tetrahedra, faces with two equivalent Co(3)Tb2P4 tetrahedra, and faces with two equivalent Co(4)Tb3P4 tetrahedra. In the fifth Co site, Co(5) is bonded to one Tb(2), three equivalent Tb(1), one P(2), and three equivalent P(3) atoms to form distorted CoTb4P4 tetrahedra that share  a cornercorner with one Co(3)Tb2P4 tetrahedra,  a cornercorner with one Co(6)Tb3P4 tetrahedra, corners with three equivalent Co(4)Tb3P4 tetrahedra, corners with seven equivalent Co(5)Tb4P4 tetrahedra, edges with two equivalent Co(5)Tb4P4 tetrahedra, edges with three equivalent Co(6)Tb3P4 tetrahedra, faces with two equivalent Co(6)Tb3P4 tetrahedra, and faces with three equivalent Co(5)Tb4P4 tetrahedra. In the sixth Co site, Co(6) is bonded to one Tb(1), two equivalent Tb(2), one P(3), one P(4), and two equivalent P(2) atoms to form distorted CoTb3P4 tetrahedra that share  a cornercorner with one Co(5)Tb4P4 tetrahedra, corners with two equivalent Co(4)Tb3P4 tetrahedra, corners with two equivalent Co(6)Tb3P4 tetrahedra, corners with three equivalent Co(3)Tb2P4 tetrahedra, edges with two equivalent Co(4)Tb3P4 tetrahedra, edges with two equivalent Co(6)Tb3P4 tetrahedra, edges with three equivalent Co(5)Tb4P4 tetrahedra,  a faceface with one Co(4)Tb3P4 tetrahedra,  a faceface with one Co(6)Tb3P4 tetrahedra, and faces with two equivalent Co(5)Tb4P4 tetrahedra. There are four inequivalent P sites. In the first P site, P(4) is bonded in a 9-coordinate geometry to two equivalent Tb(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 Tb(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 Tb(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 Tb(1), two equivalent Tb(2), one Co(2), one Co(6), and three equivalent Co(5) atoms.
TbCo3P2 crystallizes in the orthorhombic Pmmn space group. There are two inequivalent Tb sites. In the first Tb site, Tb(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 Tb(1)-Co(2) bond lengths are 2.88 Å. Both Tb(1)-Co(6) bond lengths are 3.07 Å. There are four shorter (3.02 Å) and two longer (3.15 Å) Tb(1)-Co(5) bond lengths. Both Tb(1)-P(2) bond lengths are 2.85 Å. All Tb(1)-P(3) bond lengths are 2.94 Å. In the second Tb site, Tb(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 Tb(2)-Co(3) bond length is 3.02 Å. The Tb(2)-Co(5) bond length is 2.97 Å. Both Tb(2)-Co(2) bond lengths are 2.87 Å. Both Tb(2)-Co(6) bond lengths are 2.95 Å. There is one shorter (3.00 Å) and two longer (3.07 Å) Tb(2)-Co(4) bond lengths. Both Tb(2)-P(1) bond lengths are 2.87 Å. Both Tb(2)-P(3) bond lengths are 2.85 Å. Both Tb(2)-P(4) bond lengths are 2.80 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 2.28 Å. All Co(1)-P(4) bond lengths are 2.52 Å. In the second Co site, Co(2) is bonded in a 9-coordinate geometry to two equivalent Tb(1), four equivalent Tb(2), one P(1), and two equivalent P(3) atoms. The Co(2)-P(1) bond length is 2.17 Å. Both Co(2)-P(3) bond lengths are 2.26 Å. In the third Co site, Co(3) is bonded to two equivalent Tb(2), two equivalent P(1), and two equivalent P(4) atoms to form distorted CoTb2P4 tetrahedra that share corners with two equivalent Co(3)Tb2P4 tetrahedra, corners with two equivalent Co(5)Tb4P4 tetrahedra, corners with six equivalent Co(6)Tb3P4 tetrahedra, edges with two equivalent Co(4)Tb3P4 tetrahedra, and faces with four equivalent Co(4)Tb3P4 tetrahedra. Both Co(3)-P(1) bond lengths are 2.24 Å. Both Co(3)-P(4) bond lengths are 2.15 Å. In the fourth Co site, Co(4) is bonded to three equivalent Tb(2), one P(1), and three equivalent P(4) atoms to form distorted CoTb3P4 tetrahedra that share  a cornercorner with one Co(4)Tb3P4 tetrahedra, corners with two equivalent Co(6)Tb3P4 tetrahedra, corners with three equivalent Co(5)Tb4P4 tetrahedra,  an edgeedge with one Co(3)Tb2P4 tetrahedra, edges with two equivalent Co(4)Tb3P4 tetrahedra, edges with two equivalent Co(6)Tb3P4 tetrahedra,  a faceface with one Co(6)Tb3P4 tetrahedra, faces with two equivalent Co(3)Tb2P4 tetrahedra, and faces with two equivalent Co(4)Tb3P4 tetrahedra. The Co(4)-P(1) bond length is 2.21 Å. There is one shorter (2.24 Å) and two longer (2.29 Å) Co(4)-P(4) bond lengths. In the fifth Co site, Co(5) is bonded to one Tb(2), three equivalent Tb(1), one P(2), and three equivalent P(3) atoms to form distorted CoTb4P4 tetrahedra that share  a cornercorner with one Co(3)Tb2P4 tetrahedra,  a cornercorner with one Co(6)Tb3P4 tetrahedra, corners with three equivalent Co(4)Tb3P4 tetrahedra, corners with seven equivalent Co(5)Tb4P4 tetrahedra, edges with two equivalent Co(5)Tb4P4 tetrahedra, edges with three equivalent Co(6)Tb3P4 tetrahedra, faces with two equivalent Co(6)Tb3P4 tetrahedra, and faces with three equivalent Co(5)Tb4P4 tetrahedra. The Co(5)-P(2) bond length is 2.38 Å. There are two shorter (2.22 Å) and one longer (2.24 Å) Co(5)-P(3) bond length. In the sixth Co site, Co(6) is bonded to one Tb(1), two equivalent Tb(2), one P(3), one P(4), and two equivalent P(2) atoms to form distorted CoTb3P4 tetrahedra that share  a cornercorner with one Co(5)Tb4P4 tetrahedra, corners with two equivalent Co(4)Tb3P4 tetrahedra, corners with two equivalent Co(6)Tb3P4 tetrahedra, corners with three equivalent Co(3)Tb2P4 tetrahedra, edges with two equivalent Co(4)Tb3P4 tetrahedra, edges with two equivalent Co(6)Tb3P4 tetrahedra, edges with three equivalent Co(5)Tb4P4 tetrahedra,  a faceface with one Co(4)Tb3P4 tetrahedra,  a faceface with one Co(6)Tb3P4 tetrahedra, and faces with two equivalent Co(5)Tb4P4 tetrahedra. The Co(6)-P(3) bond length is 2.30 Å. The Co(6)-P(4) bond length is 2.26 Å. Both Co(6)-P(2) bond lengths are 2.32 Å. There are four inequivalent P sites. In the first P site, P(4) is bonded in a 9-coordinate geometry to two equivalent Tb(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 Tb(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 Tb(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 Tb(1), two equivalent Tb(2), one Co(2), one Co(6), and three equivalent Co(5) atoms.