The compound described by Dy4Fe29Si5 crystallizes in the triclinic P-1 space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 19-coordinate geometry to one Fe(10), one Fe(11), one Fe(12), one Fe(13), one Fe(15), one Fe(2), one Fe(3), one Fe(5), one Fe(9), two equivalent Fe(1), two equivalent Fe(4), two equivalent Fe(6), two equivalent Fe(7), one Si(1), and one Si(2) atom. In the second Dy site, Dy(2) is bonded in a 19-coordinate geometry to one Fe(1), one Fe(10), one Fe(11), one Fe(12), one Fe(13), one Fe(14), one Fe(16), one Fe(4), one Fe(6), one Fe(9), two equivalent Fe(2), two equivalent Fe(3), two equivalent Fe(5), two equivalent Fe(8), and one Si(3) atom. There are sixteen inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one Dy(2), two equivalent Dy(1), one Fe(10), one Fe(11), one Fe(15), one Fe(4), one Fe(6), two equivalent Fe(7), one Si(1), and one Si(2) atom to form distorted FeDy3Fe7Si2 cuboctahedra that share  a cornercorner with one Fe(11)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(14)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(16)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(3)Dy3Fe8Si cuboctahedra,  a cornercorner with one Fe(5)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(1)Dy3Fe7Si2 cuboctahedra, corners with two equivalent Fe(4)Dy3Fe7Si2 cuboctahedra, corners with two equivalent Fe(2)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(6)Dy3Fe8Si cuboctahedra, corners with three equivalent Fe(13)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(13)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(15)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(4)Dy3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(2)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(3)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(5)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(6)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(13)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(15)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(1)Dy3Fe7Si2 cuboctahedra,  a faceface with one Fe(3)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(5)Dy3Fe8Si cuboctahedra, faces with two equivalent Fe(4)Dy3Fe7Si2 cuboctahedra, faces with two equivalent Fe(6)Dy3Fe8Si cuboctahedra, and faces with three equivalent Fe(11)Dy2Fe8Si2 cuboctahedra. In the second Fe site, Fe(2) is bonded to one Dy(1), two equivalent Dy(2), one Fe(12), one Fe(14), one Fe(16), one Fe(3), one Fe(5), one Fe(9), two equivalent Fe(8), and one Si(3) atom to form distorted FeDy3Fe8Si cuboctahedra that share  a cornercorner with one Fe(15)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(4)Dy3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(6)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(11)Dy2Fe8Si2 cuboctahedra, corners with two equivalent Fe(1)Dy3Fe7Si2 cuboctahedra, corners with two equivalent Fe(2)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(3)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(5)Dy3Fe8Si cuboctahedra, corners with three equivalent Fe(13)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(11)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(13)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(14)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(16)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(1)Dy3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(4)Dy3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(3)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(5)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(6)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(13)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(14)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(16)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(4)Dy3Fe7Si2 cuboctahedra,  a faceface with one Fe(2)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(6)Dy3Fe8Si cuboctahedra, faces with two equivalent Fe(3)Dy3Fe8Si cuboctahedra, and faces with two equivalent Fe(5)Dy3Fe8Si cuboctahedra. In the third Fe site, Fe(3) is bonded to one Dy(1), two equivalent Dy(2), one Fe(10), one Fe(12), one Fe(13), one Fe(16), one Fe(2), one Fe(6), one Fe(8), one Fe(9), and one Si(3) atom to form FeDy3Fe8Si cuboctahedra that share  a cornercorner with one Fe(11)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(13)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(14)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(16)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(1)Dy3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(4)Dy3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(5)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(15)Dy2Fe8Si2 cuboctahedra, corners with two equivalent Fe(2)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(6)Dy3Fe8Si cuboctahedra, corners with three equivalent Fe(3)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(11)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(13)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(14)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(1)Dy3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(4)Dy3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(2)Dy3Fe8Si cuboctahedra, edges with two equivalent Fe(5)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(11)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(13)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(14)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(16)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(1)Dy3Fe7Si2 cuboctahedra,  a faceface with one Fe(4)Dy3Fe7Si2 cuboctahedra,  a faceface with one Fe(6)Dy3Fe8Si cuboctahedra, faces with two equivalent Fe(2)Dy3Fe8Si cuboctahedra, and faces with two equivalent Fe(5)Dy3Fe8Si cuboctahedra. In the fourth Fe site, Fe(4) is bonded to one Dy(2), two equivalent Dy(1), one Fe(1), one Fe(10), one Fe(11), one Fe(13), one Fe(5), one Fe(7), one Fe(9), one Si(1), and one Si(2) atom to form distorted FeDy3Fe7Si2 cuboctahedra that share  a cornercorner with one Fe(13)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(15)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(2)Dy3Fe8Si cuboctahedra,  a cornercorner with one Fe(3)Dy3Fe8Si cuboctahedra,  a cornercorner with one Fe(6)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(11)Dy2Fe8Si2 cuboctahedra, corners with two equivalent Fe(14)Dy2Fe8Si2 cuboctahedra, corners with two equivalent Fe(1)Dy3Fe7Si2 cuboctahedra, corners with two equivalent Fe(5)Dy3Fe8Si cuboctahedra, corners with three equivalent Fe(4)Dy3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(13)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(15)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(16)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(1)Dy3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(2)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(3)Dy3Fe8Si cuboctahedra, edges with two equivalent Fe(6)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(13)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(15)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(2)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(3)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(5)Dy3Fe8Si cuboctahedra, faces with two equivalent Fe(11)Dy2Fe8Si2 cuboctahedra, faces with two equivalent Fe(1)Dy3Fe7Si2 cuboctahedra, and faces with two equivalent Fe(6)Dy3Fe8Si cuboctahedra. In the fifth Fe site, Fe(5) is bonded to one Dy(1), two equivalent Dy(2), one Fe(11), one Fe(12), one Fe(13), one Fe(14), one Fe(2), one Fe(4), one Fe(8), one Fe(9), and one Si(3) atom to form FeDy3Fe8Si cuboctahedra that share  a cornercorner with one Fe(11)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(13)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(14)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(16)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(1)Dy3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(3)Dy3Fe8Si cuboctahedra,  a cornercorner with one Fe(6)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(4)Dy3Fe7Si2 cuboctahedra, corners with two equivalent Fe(2)Dy3Fe8Si cuboctahedra, corners with three equivalent Fe(5)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(13)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(15)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(16)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(1)Dy3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(2)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(6)Dy3Fe8Si cuboctahedra, edges with two equivalent Fe(3)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(11)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(13)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(14)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(16)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(1)Dy3Fe7Si2 cuboctahedra,  a faceface with one Fe(4)Dy3Fe7Si2 cuboctahedra,  a faceface with one Fe(6)Dy3Fe8Si cuboctahedra, faces with two equivalent Fe(2)Dy3Fe8Si cuboctahedra, and faces with two equivalent Fe(3)Dy3Fe8Si cuboctahedra. In the sixth Fe site, Fe(6) is bonded to one Dy(2), two equivalent Dy(1), one Fe(1), one Fe(10), one Fe(11), one Fe(12), one Fe(13), one Fe(15), one Fe(3), one Fe(7), and one Si(2) atom to form distorted FeDy3Fe8Si cuboctahedra that share  a cornercorner with one Fe(11)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(13)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(15)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(4)Dy3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(2)Dy3Fe8Si cuboctahedra,  a cornercorner with one Fe(5)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(16)Dy2Fe8Si2 cuboctahedra, corners with two equivalent Fe(1)Dy3Fe7Si2 cuboctahedra, corners with two equivalent Fe(3)Dy3Fe8Si cuboctahedra, corners with three equivalent Fe(6)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(13)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(14)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(1)Dy3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(2)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(5)Dy3Fe8Si cuboctahedra, edges with two equivalent Fe(4)Dy3Fe7Si2 cuboctahedra,  a faceface with one Fe(13)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(15)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(2)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(3)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(5)Dy3Fe8Si cuboctahedra, faces with two equivalent Fe(1)Dy3Fe7Si2 cuboctahedra, faces with two equivalent Fe(4)Dy3Fe7Si2 cuboctahedra, and faces with three equivalent Fe(11)Dy2Fe8Si2 cuboctahedra. In the seventh Fe site, Fe(7) is bonded in a 11-coordinate geometry to two equivalent Dy(1), one Fe(10), one Fe(11), one Fe(15), one Fe(4), one Fe(6), two equivalent Fe(1), one Si(1), and two equivalent Si(2) atoms. In the eighth Fe site, Fe(8) is bonded in a 12-coordinate geometry to two equivalent Dy(2), one Fe(12), one Fe(14), one Fe(16), one Fe(3), one Fe(5), one Fe(9), two equivalent Fe(2), and two equivalent Si(3) atoms. In the ninth Fe site, Fe(9) is bonded in a 12-coordinate geometry to one Dy(1), one Dy(2), one Fe(12), one Fe(13), one Fe(16), one Fe(2), one Fe(3), one Fe(4), one Fe(5), one Fe(8), and two equivalent Si(3) atoms. In the tenth Fe site, Fe(10) is bonded in a 11-coordinate geometry to one Dy(1), one Dy(2), one Fe(1), one Fe(11), one Fe(13), one Fe(3), one Fe(4), one Fe(6), one Fe(7), one Si(1), and two equivalent Si(2) atoms. In the eleventh Fe site, Fe(11) is bonded to one Dy(1), one Dy(2), one Fe(1), one Fe(10), one Fe(13), one Fe(15), one Fe(4), one Fe(5), one Fe(6), one Fe(7), and two equivalent Si(2) atoms to form distorted FeDy2Fe8Si2 cuboctahedra that share  a cornercorner with one Fe(11)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(13)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(15)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(16)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(1)Dy3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(3)Dy3Fe8Si cuboctahedra,  a cornercorner with one Fe(5)Dy3Fe8Si cuboctahedra,  a cornercorner with one Fe(6)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(4)Dy3Fe7Si2 cuboctahedra, corners with two equivalent Fe(2)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(11)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(13)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(14)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(2)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(3)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(13)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(15)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(3)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(5)Dy3Fe8Si cuboctahedra, faces with two equivalent Fe(4)Dy3Fe7Si2 cuboctahedra, faces with three equivalent Fe(1)Dy3Fe7Si2 cuboctahedra, and faces with three equivalent Fe(6)Dy3Fe8Si cuboctahedra. In the twelfth Fe site, Fe(12) is bonded in a 12-coordinate geometry to one Dy(1), one Dy(2), one Fe(13), one Fe(14), one Fe(2), one Fe(3), one Fe(5), one Fe(6), one Fe(8), one Fe(9), and two equivalent Si(3) atoms. In the thirteenth Fe site, Fe(13) is bonded to one Dy(1), one Dy(2), one Fe(10), one Fe(11), one Fe(12), one Fe(3), one Fe(4), one Fe(5), one Fe(6), one Fe(9), one Si(2), and one Si(3) atom to form distorted FeDy2Fe8Si2 cuboctahedra that share  a cornercorner with one Fe(11)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(14)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(15)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(16)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(4)Dy3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(3)Dy3Fe8Si cuboctahedra,  a cornercorner with one Fe(5)Dy3Fe8Si cuboctahedra,  a cornercorner with one Fe(6)Dy3Fe8Si cuboctahedra, corners with three equivalent Fe(1)Dy3Fe7Si2 cuboctahedra, corners with three equivalent Fe(2)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(11)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(1)Dy3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(4)Dy3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(2)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(3)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(5)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(6)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(11)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(14)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(15)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(16)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(1)Dy3Fe7Si2 cuboctahedra,  a faceface with one Fe(4)Dy3Fe7Si2 cuboctahedra,  a faceface with one Fe(2)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(3)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(5)Dy3Fe8Si cuboctahedra, and  a faceface with one Fe(6)Dy3Fe8Si cuboctahedra. In the fourteenth Fe site, Fe(14) is bonded to two equivalent Dy(2), two equivalent Fe(12), two equivalent Fe(2), two equivalent Fe(5), two equivalent Fe(8), and two equivalent Si(3) atoms to form distorted FeDy2Fe8Si2 cuboctahedra that share corners with two equivalent Fe(13)Dy2Fe8Si2 cuboctahedra, corners with two equivalent Fe(16)Dy2Fe8Si2 cuboctahedra, corners with two equivalent Fe(1)Dy3Fe7Si2 cuboctahedra, corners with two equivalent Fe(3)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(5)Dy3Fe8Si cuboctahedra, corners with four equivalent Fe(4)Dy3Fe7Si2 cuboctahedra, edges with two equivalent Fe(11)Dy2Fe8Si2 cuboctahedra, edges with two equivalent Fe(2)Dy3Fe8Si cuboctahedra, edges with two equivalent Fe(3)Dy3Fe8Si cuboctahedra, edges with two equivalent Fe(6)Dy3Fe8Si cuboctahedra, faces with two equivalent Fe(13)Dy2Fe8Si2 cuboctahedra, faces with two equivalent Fe(16)Dy2Fe8Si2 cuboctahedra, faces with two equivalent Fe(2)Dy3Fe8Si cuboctahedra, faces with two equivalent Fe(3)Dy3Fe8Si cuboctahedra, and faces with two equivalent Fe(5)Dy3Fe8Si cuboctahedra. In the fifteenth Fe site, Fe(15) is bonded to two equivalent Dy(1), two equivalent Fe(1), two equivalent Fe(11), two equivalent Fe(6), two equivalent Fe(7), and two equivalent Si(2) atoms to form distorted FeDy2Fe8Si2 cuboctahedra that share corners with two equivalent Fe(11)Dy2Fe8Si2 cuboctahedra, corners with two equivalent Fe(13)Dy2Fe8Si2 cuboctahedra, corners with two equivalent Fe(4)Dy3Fe7Si2 cuboctahedra, corners with two equivalent Fe(2)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(6)Dy3Fe8Si cuboctahedra, corners with four equivalent Fe(3)Dy3Fe8Si cuboctahedra, edges with two equivalent Fe(1)Dy3Fe7Si2 cuboctahedra, edges with two equivalent Fe(4)Dy3Fe7Si2 cuboctahedra, edges with two equivalent Fe(5)Dy3Fe8Si cuboctahedra, faces with two equivalent Fe(11)Dy2Fe8Si2 cuboctahedra, faces with two equivalent Fe(13)Dy2Fe8Si2 cuboctahedra, faces with two equivalent Fe(1)Dy3Fe7Si2 cuboctahedra, faces with two equivalent Fe(4)Dy3Fe7Si2 cuboctahedra, and faces with two equivalent Fe(6)Dy3Fe8Si cuboctahedra. In the sixteenth Fe site, Fe(16) is bonded to two equivalent Dy(2), two equivalent Fe(2), two equivalent Fe(3), two equivalent Fe(8), two equivalent Fe(9), and two equivalent Si(3) atoms to form distorted FeDy2Fe8Si2 cuboctahedra that share corners with two equivalent Fe(11)Dy2Fe8Si2 cuboctahedra, corners with two equivalent Fe(13)Dy2Fe8Si2 cuboctahedra, corners with two equivalent Fe(14)Dy2Fe8Si2 cuboctahedra, corners with two equivalent Fe(1)Dy3Fe7Si2 cuboctahedra, corners with two equivalent Fe(3)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(5)Dy3Fe8Si cuboctahedra, corners with four equivalent Fe(6)Dy3Fe8Si cuboctahedra, edges with two equivalent Fe(4)Dy3Fe7Si2 cuboctahedra, edges with two equivalent Fe(2)Dy3Fe8Si cuboctahedra, edges with two equivalent Fe(5)Dy3Fe8Si cuboctahedra, faces with two equivalent Fe(13)Dy2Fe8Si2 cuboctahedra, faces with two equivalent Fe(14)Dy2Fe8Si2 cuboctahedra, faces with two equivalent Fe(2)Dy3Fe8Si cuboctahedra, faces with two equivalent Fe(3)Dy3Fe8Si cuboctahedra, and faces with two equivalent Fe(5)Dy3Fe8Si cuboctahedra. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 8-coordinate geometry to two equivalent Dy(1), two equivalent Fe(1), two equivalent Fe(10), two equivalent Fe(4), two equivalent Fe(7), and two equivalent Si(2) atoms. In the second Si site, Si(2) is bonded in a 14-coordinate geometry to one Dy(1), one Fe(1), one Fe(13), one Fe(15), one Fe(4), one Fe(6), two equivalent Fe(10), two equivalent Fe(11), two equivalent Fe(7), one Si(1), and one Si(2) atom. In the third Si site, Si(3) is bonded in a 14-coordinate geometry to one Dy(2), one Fe(13), one Fe(14), one Fe(16), one Fe(2), one Fe(3), one Fe(5), two equivalent Fe(12), two equivalent Fe(8), two equivalent Fe(9), and one Si(3) atom. is represented by the CIF card [CIF]
data_Dy4Fe29Si5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.371
_cell_length_b   6.365
_cell_length_c   12.741
_cell_angle_alpha   81.350
_cell_angle_beta   82.435
_cell_angle_gamma   82.410
_symmetry_Int_Tables_number   1
_cell_volume   502.993
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Dy  Dy0  1  0.662  0.651  0.327  1.0
  Dy  Dy1  1  0.654  0.656  0.826  1.0
  Dy  Dy2  1  0.346  0.344  0.174  1.0
  Dy  Dy3  1  0.338  0.349  0.673  1.0
  Fe  Fe4  1  0.337  0.333  0.426  1.0
  Fe  Fe5  1  0.338  0.339  0.922  1.0
  Fe  Fe6  1  0.341  0.845  0.169  1.0
  Fe  Fe7  1  0.335  0.850  0.667  1.0
  Fe  Fe8  1  0.845  0.339  0.170  1.0
  Fe  Fe9  1  0.834  0.346  0.672  1.0
  Fe  Fe10  1  0.662  0.661  0.078  1.0
  Fe  Fe11  1  0.663  0.667  0.574  1.0
  Fe  Fe12  1  0.665  0.150  0.333  1.0
  Fe  Fe13  1  0.659  0.155  0.831  1.0
  Fe  Fe14  1  0.166  0.654  0.328  1.0
  Fe  Fe15  1  0.155  0.661  0.830  1.0
  Fe  Fe16  1  0.315  0.688  0.499  1.0
  Fe  Fe17  1  0.305  0.696  0.999  1.0
  Fe  Fe18  1  0.697  0.000  0.153  1.0
  Fe  Fe19  1  0.685  0.005  0.654  1.0
  Fe  Fe20  1  0.001  0.293  0.354  1.0
  Fe  Fe21  1  0.999  0.301  0.850  1.0
  Fe  Fe22  1  0.315  0.995  0.346  1.0
  Fe  Fe23  1  0.303  1.000  0.847  1.0
  Fe  Fe24  1  0.001  0.699  0.150  1.0
  Fe  Fe25  1  0.999  0.707  0.646  1.0
  Fe  Fe26  1  0.685  0.312  0.501  1.0
  Fe  Fe27  1  0.695  0.304  0.001  1.0
  Fe  Fe28  1  0.003  0.998  0.250  1.0
  Fe  Fe29  1  0.997  0.002  0.750  1.0
  Fe  Fe30  1  0.000  0.500  0.000  1.0
  Fe  Fe31  1  0.000  0.500  0.500  1.0
  Fe  Fe32  1  0.500  0.000  0.000  1.0
  Si  Si33  1  0.500  0.000  0.500  1.0
  Si  Si34  1  0.928  0.888  0.444  1.0
  Si  Si35  1  0.900  0.898  0.950  1.0
  Si  Si36  1  0.100  0.102  0.050  1.0
  Si  Si37  1  0.072  0.112  0.556  1.0
[/CIF]
.
The compound described by Dy4Fe29Si5 crystallizes in the triclinic P-1 space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 19-coordinate geometry to one Fe(10), one Fe(11), one Fe(12), one Fe(13), one Fe(15), one Fe(2), one Fe(3), one Fe(5), one Fe(9), two equivalent Fe(1), two equivalent Fe(4), two equivalent Fe(6), two equivalent Fe(7), one Si(1), and one Si(2) atom. In the second Dy site, Dy(2) is bonded in a 19-coordinate geometry to one Fe(1), one Fe(10), one Fe(11), one Fe(12), one Fe(13), one Fe(14), one Fe(16), one Fe(4), one Fe(6), one Fe(9), two equivalent Fe(2), two equivalent Fe(3), two equivalent Fe(5), two equivalent Fe(8), and one Si(3) atom. There are sixteen inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one Dy(2), two equivalent Dy(1), one Fe(10), one Fe(11), one Fe(15), one Fe(4), one Fe(6), two equivalent Fe(7), one Si(1), and one Si(2) atom to form distorted FeDy3Fe7Si2 cuboctahedra that share  a cornercorner with one Fe(11)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(14)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(16)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(3)Dy3Fe8Si cuboctahedra,  a cornercorner with one Fe(5)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(1)Dy3Fe7Si2 cuboctahedra, corners with two equivalent Fe(4)Dy3Fe7Si2 cuboctahedra, corners with two equivalent Fe(2)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(6)Dy3Fe8Si cuboctahedra, corners with three equivalent Fe(13)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(13)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(15)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(4)Dy3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(2)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(3)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(5)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(6)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(13)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(15)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(1)Dy3Fe7Si2 cuboctahedra,  a faceface with one Fe(3)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(5)Dy3Fe8Si cuboctahedra, faces with two equivalent Fe(4)Dy3Fe7Si2 cuboctahedra, faces with two equivalent Fe(6)Dy3Fe8Si cuboctahedra, and faces with three equivalent Fe(11)Dy2Fe8Si2 cuboctahedra. In the second Fe site, Fe(2) is bonded to one Dy(1), two equivalent Dy(2), one Fe(12), one Fe(14), one Fe(16), one Fe(3), one Fe(5), one Fe(9), two equivalent Fe(8), and one Si(3) atom to form distorted FeDy3Fe8Si cuboctahedra that share  a cornercorner with one Fe(15)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(4)Dy3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(6)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(11)Dy2Fe8Si2 cuboctahedra, corners with two equivalent Fe(1)Dy3Fe7Si2 cuboctahedra, corners with two equivalent Fe(2)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(3)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(5)Dy3Fe8Si cuboctahedra, corners with three equivalent Fe(13)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(11)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(13)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(14)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(16)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(1)Dy3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(4)Dy3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(3)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(5)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(6)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(13)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(14)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(16)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(4)Dy3Fe7Si2 cuboctahedra,  a faceface with one Fe(2)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(6)Dy3Fe8Si cuboctahedra, faces with two equivalent Fe(3)Dy3Fe8Si cuboctahedra, and faces with two equivalent Fe(5)Dy3Fe8Si cuboctahedra. In the third Fe site, Fe(3) is bonded to one Dy(1), two equivalent Dy(2), one Fe(10), one Fe(12), one Fe(13), one Fe(16), one Fe(2), one Fe(6), one Fe(8), one Fe(9), and one Si(3) atom to form FeDy3Fe8Si cuboctahedra that share  a cornercorner with one Fe(11)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(13)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(14)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(16)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(1)Dy3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(4)Dy3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(5)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(15)Dy2Fe8Si2 cuboctahedra, corners with two equivalent Fe(2)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(6)Dy3Fe8Si cuboctahedra, corners with three equivalent Fe(3)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(11)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(13)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(14)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(1)Dy3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(4)Dy3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(2)Dy3Fe8Si cuboctahedra, edges with two equivalent Fe(5)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(11)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(13)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(14)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(16)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(1)Dy3Fe7Si2 cuboctahedra,  a faceface with one Fe(4)Dy3Fe7Si2 cuboctahedra,  a faceface with one Fe(6)Dy3Fe8Si cuboctahedra, faces with two equivalent Fe(2)Dy3Fe8Si cuboctahedra, and faces with two equivalent Fe(5)Dy3Fe8Si cuboctahedra. In the fourth Fe site, Fe(4) is bonded to one Dy(2), two equivalent Dy(1), one Fe(1), one Fe(10), one Fe(11), one Fe(13), one Fe(5), one Fe(7), one Fe(9), one Si(1), and one Si(2) atom to form distorted FeDy3Fe7Si2 cuboctahedra that share  a cornercorner with one Fe(13)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(15)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(2)Dy3Fe8Si cuboctahedra,  a cornercorner with one Fe(3)Dy3Fe8Si cuboctahedra,  a cornercorner with one Fe(6)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(11)Dy2Fe8Si2 cuboctahedra, corners with two equivalent Fe(14)Dy2Fe8Si2 cuboctahedra, corners with two equivalent Fe(1)Dy3Fe7Si2 cuboctahedra, corners with two equivalent Fe(5)Dy3Fe8Si cuboctahedra, corners with three equivalent Fe(4)Dy3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(13)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(15)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(16)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(1)Dy3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(2)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(3)Dy3Fe8Si cuboctahedra, edges with two equivalent Fe(6)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(13)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(15)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(2)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(3)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(5)Dy3Fe8Si cuboctahedra, faces with two equivalent Fe(11)Dy2Fe8Si2 cuboctahedra, faces with two equivalent Fe(1)Dy3Fe7Si2 cuboctahedra, and faces with two equivalent Fe(6)Dy3Fe8Si cuboctahedra. In the fifth Fe site, Fe(5) is bonded to one Dy(1), two equivalent Dy(2), one Fe(11), one Fe(12), one Fe(13), one Fe(14), one Fe(2), one Fe(4), one Fe(8), one Fe(9), and one Si(3) atom to form FeDy3Fe8Si cuboctahedra that share  a cornercorner with one Fe(11)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(13)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(14)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(16)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(1)Dy3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(3)Dy3Fe8Si cuboctahedra,  a cornercorner with one Fe(6)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(4)Dy3Fe7Si2 cuboctahedra, corners with two equivalent Fe(2)Dy3Fe8Si cuboctahedra, corners with three equivalent Fe(5)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(13)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(15)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(16)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(1)Dy3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(2)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(6)Dy3Fe8Si cuboctahedra, edges with two equivalent Fe(3)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(11)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(13)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(14)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(16)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(1)Dy3Fe7Si2 cuboctahedra,  a faceface with one Fe(4)Dy3Fe7Si2 cuboctahedra,  a faceface with one Fe(6)Dy3Fe8Si cuboctahedra, faces with two equivalent Fe(2)Dy3Fe8Si cuboctahedra, and faces with two equivalent Fe(3)Dy3Fe8Si cuboctahedra. In the sixth Fe site, Fe(6) is bonded to one Dy(2), two equivalent Dy(1), one Fe(1), one Fe(10), one Fe(11), one Fe(12), one Fe(13), one Fe(15), one Fe(3), one Fe(7), and one Si(2) atom to form distorted FeDy3Fe8Si cuboctahedra that share  a cornercorner with one Fe(11)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(13)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(15)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(4)Dy3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(2)Dy3Fe8Si cuboctahedra,  a cornercorner with one Fe(5)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(16)Dy2Fe8Si2 cuboctahedra, corners with two equivalent Fe(1)Dy3Fe7Si2 cuboctahedra, corners with two equivalent Fe(3)Dy3Fe8Si cuboctahedra, corners with three equivalent Fe(6)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(13)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(14)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(1)Dy3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(2)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(5)Dy3Fe8Si cuboctahedra, edges with two equivalent Fe(4)Dy3Fe7Si2 cuboctahedra,  a faceface with one Fe(13)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(15)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(2)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(3)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(5)Dy3Fe8Si cuboctahedra, faces with two equivalent Fe(1)Dy3Fe7Si2 cuboctahedra, faces with two equivalent Fe(4)Dy3Fe7Si2 cuboctahedra, and faces with three equivalent Fe(11)Dy2Fe8Si2 cuboctahedra. In the seventh Fe site, Fe(7) is bonded in a 11-coordinate geometry to two equivalent Dy(1), one Fe(10), one Fe(11), one Fe(15), one Fe(4), one Fe(6), two equivalent Fe(1), one Si(1), and two equivalent Si(2) atoms. In the eighth Fe site, Fe(8) is bonded in a 12-coordinate geometry to two equivalent Dy(2), one Fe(12), one Fe(14), one Fe(16), one Fe(3), one Fe(5), one Fe(9), two equivalent Fe(2), and two equivalent Si(3) atoms. In the ninth Fe site, Fe(9) is bonded in a 12-coordinate geometry to one Dy(1), one Dy(2), one Fe(12), one Fe(13), one Fe(16), one Fe(2), one Fe(3), one Fe(4), one Fe(5), one Fe(8), and two equivalent Si(3) atoms. In the tenth Fe site, Fe(10) is bonded in a 11-coordinate geometry to one Dy(1), one Dy(2), one Fe(1), one Fe(11), one Fe(13), one Fe(3), one Fe(4), one Fe(6), one Fe(7), one Si(1), and two equivalent Si(2) atoms. In the eleventh Fe site, Fe(11) is bonded to one Dy(1), one Dy(2), one Fe(1), one Fe(10), one Fe(13), one Fe(15), one Fe(4), one Fe(5), one Fe(6), one Fe(7), and two equivalent Si(2) atoms to form distorted FeDy2Fe8Si2 cuboctahedra that share  a cornercorner with one Fe(11)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(13)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(15)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(16)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(1)Dy3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(3)Dy3Fe8Si cuboctahedra,  a cornercorner with one Fe(5)Dy3Fe8Si cuboctahedra,  a cornercorner with one Fe(6)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(4)Dy3Fe7Si2 cuboctahedra, corners with two equivalent Fe(2)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(11)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(13)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(14)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(2)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(3)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(13)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(15)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(3)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(5)Dy3Fe8Si cuboctahedra, faces with two equivalent Fe(4)Dy3Fe7Si2 cuboctahedra, faces with three equivalent Fe(1)Dy3Fe7Si2 cuboctahedra, and faces with three equivalent Fe(6)Dy3Fe8Si cuboctahedra. In the twelfth Fe site, Fe(12) is bonded in a 12-coordinate geometry to one Dy(1), one Dy(2), one Fe(13), one Fe(14), one Fe(2), one Fe(3), one Fe(5), one Fe(6), one Fe(8), one Fe(9), and two equivalent Si(3) atoms. In the thirteenth Fe site, Fe(13) is bonded to one Dy(1), one Dy(2), one Fe(10), one Fe(11), one Fe(12), one Fe(3), one Fe(4), one Fe(5), one Fe(6), one Fe(9), one Si(2), and one Si(3) atom to form distorted FeDy2Fe8Si2 cuboctahedra that share  a cornercorner with one Fe(11)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(14)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(15)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(16)Dy2Fe8Si2 cuboctahedra,  a cornercorner with one Fe(4)Dy3Fe7Si2 cuboctahedra,  a cornercorner with one Fe(3)Dy3Fe8Si cuboctahedra,  a cornercorner with one Fe(5)Dy3Fe8Si cuboctahedra,  a cornercorner with one Fe(6)Dy3Fe8Si cuboctahedra, corners with three equivalent Fe(1)Dy3Fe7Si2 cuboctahedra, corners with three equivalent Fe(2)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(11)Dy2Fe8Si2 cuboctahedra,  an edgeedge with one Fe(1)Dy3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(4)Dy3Fe7Si2 cuboctahedra,  an edgeedge with one Fe(2)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(3)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(5)Dy3Fe8Si cuboctahedra,  an edgeedge with one Fe(6)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(11)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(14)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(15)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(16)Dy2Fe8Si2 cuboctahedra,  a faceface with one Fe(1)Dy3Fe7Si2 cuboctahedra,  a faceface with one Fe(4)Dy3Fe7Si2 cuboctahedra,  a faceface with one Fe(2)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(3)Dy3Fe8Si cuboctahedra,  a faceface with one Fe(5)Dy3Fe8Si cuboctahedra, and  a faceface with one Fe(6)Dy3Fe8Si cuboctahedra. In the fourteenth Fe site, Fe(14) is bonded to two equivalent Dy(2), two equivalent Fe(12), two equivalent Fe(2), two equivalent Fe(5), two equivalent Fe(8), and two equivalent Si(3) atoms to form distorted FeDy2Fe8Si2 cuboctahedra that share corners with two equivalent Fe(13)Dy2Fe8Si2 cuboctahedra, corners with two equivalent Fe(16)Dy2Fe8Si2 cuboctahedra, corners with two equivalent Fe(1)Dy3Fe7Si2 cuboctahedra, corners with two equivalent Fe(3)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(5)Dy3Fe8Si cuboctahedra, corners with four equivalent Fe(4)Dy3Fe7Si2 cuboctahedra, edges with two equivalent Fe(11)Dy2Fe8Si2 cuboctahedra, edges with two equivalent Fe(2)Dy3Fe8Si cuboctahedra, edges with two equivalent Fe(3)Dy3Fe8Si cuboctahedra, edges with two equivalent Fe(6)Dy3Fe8Si cuboctahedra, faces with two equivalent Fe(13)Dy2Fe8Si2 cuboctahedra, faces with two equivalent Fe(16)Dy2Fe8Si2 cuboctahedra, faces with two equivalent Fe(2)Dy3Fe8Si cuboctahedra, faces with two equivalent Fe(3)Dy3Fe8Si cuboctahedra, and faces with two equivalent Fe(5)Dy3Fe8Si cuboctahedra. In the fifteenth Fe site, Fe(15) is bonded to two equivalent Dy(1), two equivalent Fe(1), two equivalent Fe(11), two equivalent Fe(6), two equivalent Fe(7), and two equivalent Si(2) atoms to form distorted FeDy2Fe8Si2 cuboctahedra that share corners with two equivalent Fe(11)Dy2Fe8Si2 cuboctahedra, corners with two equivalent Fe(13)Dy2Fe8Si2 cuboctahedra, corners with two equivalent Fe(4)Dy3Fe7Si2 cuboctahedra, corners with two equivalent Fe(2)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(6)Dy3Fe8Si cuboctahedra, corners with four equivalent Fe(3)Dy3Fe8Si cuboctahedra, edges with two equivalent Fe(1)Dy3Fe7Si2 cuboctahedra, edges with two equivalent Fe(4)Dy3Fe7Si2 cuboctahedra, edges with two equivalent Fe(5)Dy3Fe8Si cuboctahedra, faces with two equivalent Fe(11)Dy2Fe8Si2 cuboctahedra, faces with two equivalent Fe(13)Dy2Fe8Si2 cuboctahedra, faces with two equivalent Fe(1)Dy3Fe7Si2 cuboctahedra, faces with two equivalent Fe(4)Dy3Fe7Si2 cuboctahedra, and faces with two equivalent Fe(6)Dy3Fe8Si cuboctahedra. In the sixteenth Fe site, Fe(16) is bonded to two equivalent Dy(2), two equivalent Fe(2), two equivalent Fe(3), two equivalent Fe(8), two equivalent Fe(9), and two equivalent Si(3) atoms to form distorted FeDy2Fe8Si2 cuboctahedra that share corners with two equivalent Fe(11)Dy2Fe8Si2 cuboctahedra, corners with two equivalent Fe(13)Dy2Fe8Si2 cuboctahedra, corners with two equivalent Fe(14)Dy2Fe8Si2 cuboctahedra, corners with two equivalent Fe(1)Dy3Fe7Si2 cuboctahedra, corners with two equivalent Fe(3)Dy3Fe8Si cuboctahedra, corners with two equivalent Fe(5)Dy3Fe8Si cuboctahedra, corners with four equivalent Fe(6)Dy3Fe8Si cuboctahedra, edges with two equivalent Fe(4)Dy3Fe7Si2 cuboctahedra, edges with two equivalent Fe(2)Dy3Fe8Si cuboctahedra, edges with two equivalent Fe(5)Dy3Fe8Si cuboctahedra, faces with two equivalent Fe(13)Dy2Fe8Si2 cuboctahedra, faces with two equivalent Fe(14)Dy2Fe8Si2 cuboctahedra, faces with two equivalent Fe(2)Dy3Fe8Si cuboctahedra, faces with two equivalent Fe(3)Dy3Fe8Si cuboctahedra, and faces with two equivalent Fe(5)Dy3Fe8Si cuboctahedra. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 8-coordinate geometry to two equivalent Dy(1), two equivalent Fe(1), two equivalent Fe(10), two equivalent Fe(4), two equivalent Fe(7), and two equivalent Si(2) atoms. In the second Si site, Si(2) is bonded in a 14-coordinate geometry to one Dy(1), one Fe(1), one Fe(13), one Fe(15), one Fe(4), one Fe(6), two equivalent Fe(10), two equivalent Fe(11), two equivalent Fe(7), one Si(1), and one Si(2) atom. In the third Si site, Si(3) is bonded in a 14-coordinate geometry to one Dy(2), one Fe(13), one Fe(14), one Fe(16), one Fe(2), one Fe(3), one Fe(5), two equivalent Fe(12), two equivalent Fe(8), two equivalent Fe(9), and one Si(3) atom. is represented by the CIF card [CIF]
data_Dy4Fe29Si5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.371
_cell_length_b   6.365
_cell_length_c   12.741
_cell_angle_alpha   81.350
_cell_angle_beta   82.435
_cell_angle_gamma   82.410
_symmetry_Int_Tables_number   1
_cell_volume   502.993
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Dy  Dy0  1  0.662  0.651  0.327  1.0
  Dy  Dy1  1  0.654  0.656  0.826  1.0
  Dy  Dy2  1  0.346  0.344  0.174  1.0
  Dy  Dy3  1  0.338  0.349  0.673  1.0
  Fe  Fe4  1  0.337  0.333  0.426  1.0
  Fe  Fe5  1  0.338  0.339  0.922  1.0
  Fe  Fe6  1  0.341  0.845  0.169  1.0
  Fe  Fe7  1  0.335  0.850  0.667  1.0
  Fe  Fe8  1  0.845  0.339  0.170  1.0
  Fe  Fe9  1  0.834  0.346  0.672  1.0
  Fe  Fe10  1  0.662  0.661  0.078  1.0
  Fe  Fe11  1  0.663  0.667  0.574  1.0
  Fe  Fe12  1  0.665  0.150  0.333  1.0
  Fe  Fe13  1  0.659  0.155  0.831  1.0
  Fe  Fe14  1  0.166  0.654  0.328  1.0
  Fe  Fe15  1  0.155  0.661  0.830  1.0
  Fe  Fe16  1  0.315  0.688  0.499  1.0
  Fe  Fe17  1  0.305  0.696  0.999  1.0
  Fe  Fe18  1  0.697  0.000  0.153  1.0
  Fe  Fe19  1  0.685  0.005  0.654  1.0
  Fe  Fe20  1  0.001  0.293  0.354  1.0
  Fe  Fe21  1  0.999  0.301  0.850  1.0
  Fe  Fe22  1  0.315  0.995  0.346  1.0
  Fe  Fe23  1  0.303  1.000  0.847  1.0
  Fe  Fe24  1  0.001  0.699  0.150  1.0
  Fe  Fe25  1  0.999  0.707  0.646  1.0
  Fe  Fe26  1  0.685  0.312  0.501  1.0
  Fe  Fe27  1  0.695  0.304  0.001  1.0
  Fe  Fe28  1  0.003  0.998  0.250  1.0
  Fe  Fe29  1  0.997  0.002  0.750  1.0
  Fe  Fe30  1  0.000  0.500  0.000  1.0
  Fe  Fe31  1  0.000  0.500  0.500  1.0
  Fe  Fe32  1  0.500  0.000  0.000  1.0
  Si  Si33  1  0.500  0.000  0.500  1.0
  Si  Si34  1  0.928  0.888  0.444  1.0
  Si  Si35  1  0.900  0.898  0.950  1.0
  Si  Si36  1  0.100  0.102  0.050  1.0
  Si  Si37  1  0.072  0.112  0.556  1.0
[/CIF]
.