DyFe5P3 crystallizes in the orthorhombic Pnma space group. Dy(1) is bonded in a 16-coordinate geometry to one Fe(5), three equivalent Fe(2), three equivalent Fe(3), three equivalent Fe(4), two equivalent P(1), two equivalent P(2), and two equivalent P(3) atoms. There are five inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 5-coordinate geometry to one P(3), two equivalent P(1), and two equivalent P(2) atoms. In the second Fe site, Fe(2) is bonded to three equivalent Dy(1), one P(2), and three equivalent P(3) atoms to form distorted FeDy3P4 tetrahedra that share corners with three equivalent Fe(4)Dy3P4 tetrahedra, corners with four equivalent Fe(5)DyP4 tetrahedra, corners with six equivalent Fe(3)Dy3P4 tetrahedra, edges with two equivalent Fe(2)Dy3P4 tetrahedra, edges with two equivalent Fe(3)Dy3P4 tetrahedra, edges with four equivalent Fe(4)Dy3P4 tetrahedra,  a faceface with one Fe(4)Dy3P4 tetrahedra, faces with two equivalent Fe(2)Dy3P4 tetrahedra, and faces with two equivalent Fe(3)Dy3P4 tetrahedra. In the third Fe site, Fe(3) is bonded to three equivalent Dy(1), one P(1), one P(2), and two equivalent P(3) atoms to form distorted FeDy3P4 tetrahedra that share  a cornercorner with one Fe(5)DyP4 tetrahedra, corners with three equivalent Fe(4)Dy3P4 tetrahedra, corners with four equivalent Fe(3)Dy3P4 tetrahedra, corners with six equivalent Fe(2)Dy3P4 tetrahedra, edges with two equivalent Fe(2)Dy3P4 tetrahedra, edges with two equivalent Fe(3)Dy3P4 tetrahedra, edges with three equivalent Fe(5)DyP4 tetrahedra, faces with two equivalent Fe(2)Dy3P4 tetrahedra, and faces with three equivalent Fe(4)Dy3P4 tetrahedra. In the fourth Fe site, Fe(4) is bonded to three equivalent Dy(1), one P(1), one P(3), and two equivalent P(2) atoms to form distorted FeDy3P4 tetrahedra that share corners with two equivalent Fe(5)DyP4 tetrahedra, corners with three equivalent Fe(2)Dy3P4 tetrahedra, corners with three equivalent Fe(3)Dy3P4 tetrahedra, corners with four equivalent Fe(4)Dy3P4 tetrahedra, edges with two equivalent Fe(4)Dy3P4 tetrahedra, edges with four equivalent Fe(2)Dy3P4 tetrahedra,  a faceface with one Fe(2)Dy3P4 tetrahedra, faces with two equivalent Fe(5)DyP4 tetrahedra, and faces with three equivalent Fe(3)Dy3P4 tetrahedra. In the fifth Fe site, Fe(5) is bonded to one Dy(1), one P(2), and three equivalent P(1) atoms to form distorted FeDyP4 tetrahedra that share  a cornercorner with one Fe(3)Dy3P4 tetrahedra, corners with two equivalent Fe(4)Dy3P4 tetrahedra, corners with two equivalent Fe(5)DyP4 tetrahedra, corners with four equivalent Fe(2)Dy3P4 tetrahedra, edges with two equivalent Fe(5)DyP4 tetrahedra, edges with three equivalent Fe(3)Dy3P4 tetrahedra, and faces with two equivalent Fe(4)Dy3P4 tetrahedra. There are three inequivalent P sites. In the first P site, P(3) is bonded in a 9-coordinate geometry to two equivalent Dy(1), one Fe(1), one Fe(4), two equivalent Fe(3), and three equivalent Fe(2) atoms. In the second P site, P(1) is bonded in a 9-coordinate geometry to two equivalent Dy(1), one Fe(3), one Fe(4), two equivalent Fe(1), and three equivalent Fe(5) atoms. In the third P site, P(2) is bonded in a 9-coordinate geometry to two equivalent Dy(1), one Fe(2), one Fe(3), one Fe(5), two equivalent Fe(1), and two equivalent Fe(4) atoms.
DyFe5P3 crystallizes in the orthorhombic Pnma space group. Dy(1) is bonded in a 16-coordinate geometry to one Fe(5), three equivalent Fe(2), three equivalent Fe(3), three equivalent Fe(4), two equivalent P(1), two equivalent P(2), and two equivalent P(3) atoms. The Dy(1)-Fe(5) bond length is 2.99 Å. There are two shorter (2.97 Å) and one longer (3.11 Å) Dy(1)-Fe(2) bond length. All Dy(1)-Fe(3) bond lengths are 3.12 Å. There is one shorter (3.02 Å) and two longer (3.04 Å) Dy(1)-Fe(4) bond lengths. Both Dy(1)-P(1) bond lengths are 2.86 Å. Both Dy(1)-P(2) bond lengths are 2.81 Å. Both Dy(1)-P(3) bond lengths are 2.87 Å. There are five inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 5-coordinate geometry to one P(3), two equivalent P(1), and two equivalent P(2) atoms. The Fe(1)-P(3) bond length is 2.29 Å. Both Fe(1)-P(1) bond lengths are 2.61 Å. Both Fe(1)-P(2) bond lengths are 2.46 Å. In the second Fe site, Fe(2) is bonded to three equivalent Dy(1), one P(2), and three equivalent P(3) atoms to form distorted FeDy3P4 tetrahedra that share corners with three equivalent Fe(4)Dy3P4 tetrahedra, corners with four equivalent Fe(5)DyP4 tetrahedra, corners with six equivalent Fe(3)Dy3P4 tetrahedra, edges with two equivalent Fe(2)Dy3P4 tetrahedra, edges with two equivalent Fe(3)Dy3P4 tetrahedra, edges with four equivalent Fe(4)Dy3P4 tetrahedra,  a faceface with one Fe(4)Dy3P4 tetrahedra, faces with two equivalent Fe(2)Dy3P4 tetrahedra, and faces with two equivalent Fe(3)Dy3P4 tetrahedra. The Fe(2)-P(2) bond length is 2.24 Å. There are two shorter (2.24 Å) and one longer (2.26 Å) Fe(2)-P(3) bond length. In the third Fe site, Fe(3) is bonded to three equivalent Dy(1), one P(1), one P(2), and two equivalent P(3) atoms to form distorted FeDy3P4 tetrahedra that share  a cornercorner with one Fe(5)DyP4 tetrahedra, corners with three equivalent Fe(4)Dy3P4 tetrahedra, corners with four equivalent Fe(3)Dy3P4 tetrahedra, corners with six equivalent Fe(2)Dy3P4 tetrahedra, edges with two equivalent Fe(2)Dy3P4 tetrahedra, edges with two equivalent Fe(3)Dy3P4 tetrahedra, edges with three equivalent Fe(5)DyP4 tetrahedra, faces with two equivalent Fe(2)Dy3P4 tetrahedra, and faces with three equivalent Fe(4)Dy3P4 tetrahedra. The Fe(3)-P(1) bond length is 2.33 Å. The Fe(3)-P(2) bond length is 2.35 Å. Both Fe(3)-P(3) bond lengths are 2.42 Å. In the fourth Fe site, Fe(4) is bonded to three equivalent Dy(1), one P(1), one P(3), and two equivalent P(2) atoms to form distorted FeDy3P4 tetrahedra that share corners with two equivalent Fe(5)DyP4 tetrahedra, corners with three equivalent Fe(2)Dy3P4 tetrahedra, corners with three equivalent Fe(3)Dy3P4 tetrahedra, corners with four equivalent Fe(4)Dy3P4 tetrahedra, edges with two equivalent Fe(4)Dy3P4 tetrahedra, edges with four equivalent Fe(2)Dy3P4 tetrahedra,  a faceface with one Fe(2)Dy3P4 tetrahedra, faces with two equivalent Fe(5)DyP4 tetrahedra, and faces with three equivalent Fe(3)Dy3P4 tetrahedra. The Fe(4)-P(1) bond length is 2.36 Å. The Fe(4)-P(3) bond length is 2.34 Å. Both Fe(4)-P(2) bond lengths are 2.35 Å. In the fifth Fe site, Fe(5) is bonded to one Dy(1), one P(2), and three equivalent P(1) atoms to form distorted FeDyP4 tetrahedra that share  a cornercorner with one Fe(3)Dy3P4 tetrahedra, corners with two equivalent Fe(4)Dy3P4 tetrahedra, corners with two equivalent Fe(5)DyP4 tetrahedra, corners with four equivalent Fe(2)Dy3P4 tetrahedra, edges with two equivalent Fe(5)DyP4 tetrahedra, edges with three equivalent Fe(3)Dy3P4 tetrahedra, and faces with two equivalent Fe(4)Dy3P4 tetrahedra. The Fe(5)-P(2) bond length is 2.16 Å. There is one shorter (2.19 Å) and two longer (2.22 Å) Fe(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 Dy(1), one Fe(1), one Fe(4), two equivalent Fe(3), and three equivalent Fe(2) atoms. In the second P site, P(1) is bonded in a 9-coordinate geometry to two equivalent Dy(1), one Fe(3), one Fe(4), two equivalent Fe(1), and three equivalent Fe(5) atoms. In the third P site, P(2) is bonded in a 9-coordinate geometry to two equivalent Dy(1), one Fe(2), one Fe(3), one Fe(5), two equivalent Fe(1), and two equivalent Fe(4) atoms.