The material structure described by Ho3Fe29 crystallizes in the monoclinic C2/m space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a 20-coordinate geometry to two equivalent Fe(2), two equivalent Fe(6), two equivalent Fe(7), two equivalent Fe(9), four equivalent Fe(11), four equivalent Fe(4), and four equivalent Fe(8) atoms. In the second Ho site, Ho(2) is bonded in a 19-coordinate geometry to one Fe(1), one Fe(3), one Fe(7), two equivalent Fe(4), two equivalent Fe(8), two equivalent Fe(9), four equivalent Fe(5), and six equivalent Fe(10) atoms. There are eleven inequivalent Fe sites. In the first Fe site, Fe(11) is bonded to two equivalent Ho(1), two equivalent Fe(2), two equivalent Fe(4), two equivalent Fe(6), two equivalent Fe(7), and two equivalent Fe(8) atoms to form FeHo2Fe10 cuboctahedra that share corners with two equivalent Fe(11)Ho2Fe10 cuboctahedra, corners with four equivalent Fe(4)Ho2Fe10 cuboctahedra, corners with four equivalent Fe(7)Ho2Fe10 cuboctahedra, corners with four equivalent Fe(8)Ho2Fe10 cuboctahedra, corners with four equivalent Fe(10)Ho3Fe9 cuboctahedra, edges with two equivalent Fe(11)Ho2Fe10 cuboctahedra, edges with two equivalent Fe(4)Ho2Fe10 cuboctahedra, edges with two equivalent Fe(8)Ho2Fe10 cuboctahedra, edges with two equivalent Fe(9)Ho3Fe9 cuboctahedra, faces with two equivalent Fe(11)Ho2Fe10 cuboctahedra, faces with two equivalent Fe(7)Ho2Fe10 cuboctahedra, faces with two equivalent Fe(9)Ho3Fe9 cuboctahedra, faces with four equivalent Fe(4)Ho2Fe10 cuboctahedra, and faces with four equivalent Fe(8)Ho2Fe10 cuboctahedra. In the second Fe site, Fe(1) is bonded to two equivalent Ho(2), two equivalent Fe(3), four equivalent Fe(10), and four equivalent Fe(5) atoms to form distorted FeHo2Fe10 cuboctahedra that share corners with four equivalent Fe(4)Ho2Fe10 cuboctahedra, corners with four equivalent Fe(8)Ho2Fe10 cuboctahedra, corners with four equivalent Fe(10)Ho3Fe9 cuboctahedra, corners with six equivalent Fe(9)Ho3Fe9 cuboctahedra, edges with two equivalent Fe(7)Ho2Fe10 cuboctahedra, edges with four equivalent Fe(10)Ho3Fe9 cuboctahedra, faces with two equivalent Fe(9)Ho3Fe9 cuboctahedra, faces with four equivalent Fe(4)Ho2Fe10 cuboctahedra, faces with four equivalent Fe(8)Ho2Fe10 cuboctahedra, and faces with four equivalent Fe(10)Ho3Fe9 cuboctahedra. In the third Fe site, Fe(2) is bonded in a 14-coordinate geometry to one Ho(1), one Fe(3), one Fe(7), one Fe(9), two equivalent Fe(11), two equivalent Fe(4), two equivalent Fe(5), two equivalent Fe(6), and two equivalent Fe(8) atoms. In the fourth Fe site, Fe(3) is bonded in a 14-coordinate geometry to one Ho(2), one Fe(1), one Fe(2), one Fe(7), two equivalent Fe(10), two equivalent Fe(4), two equivalent Fe(5), two equivalent Fe(6), and two equivalent Fe(8) atoms. In the fifth Fe site, Fe(4) is bonded to one Ho(1), one Ho(2), one Fe(10), one Fe(11), one Fe(2), one Fe(3), one Fe(5), one Fe(6), one Fe(7), one Fe(9), and two equivalent Fe(8) atoms to form distorted FeHo2Fe10 cuboctahedra that share  a cornercorner with one Fe(1)Ho2Fe10 cuboctahedra,  a cornercorner with one Fe(7)Ho2Fe10 cuboctahedra, corners with two equivalent Fe(11)Ho2Fe10 cuboctahedra, corners with two equivalent Fe(9)Ho3Fe9 cuboctahedra, corners with three equivalent Fe(8)Ho2Fe10 cuboctahedra, corners with three equivalent Fe(10)Ho3Fe9 cuboctahedra, corners with four equivalent Fe(4)Ho2Fe10 cuboctahedra,  an edgeedge with one Fe(11)Ho2Fe10 cuboctahedra,  an edgeedge with one Fe(10)Ho3Fe9 cuboctahedra, edges with two equivalent Fe(4)Ho2Fe10 cuboctahedra, edges with two equivalent Fe(8)Ho2Fe10 cuboctahedra,  a faceface with one Fe(1)Ho2Fe10 cuboctahedra,  a faceface with one Fe(4)Ho2Fe10 cuboctahedra, faces with two equivalent Fe(11)Ho2Fe10 cuboctahedra, faces with two equivalent Fe(9)Ho3Fe9 cuboctahedra, faces with three equivalent Fe(7)Ho2Fe10 cuboctahedra, faces with three equivalent Fe(8)Ho2Fe10 cuboctahedra, and faces with three equivalent Fe(10)Ho3Fe9 cuboctahedra. In the sixth Fe site, Fe(5) is bonded in a 12-coordinate geometry to two equivalent Ho(2), one Fe(1), one Fe(2), one Fe(3), one Fe(4), one Fe(5), one Fe(8), one Fe(9), and three equivalent Fe(10) atoms. In the seventh Fe site, Fe(6) is bonded in a 14-coordinate geometry to one Ho(1), one Fe(6), two equivalent Fe(11), two equivalent Fe(2), two equivalent Fe(3), two equivalent Fe(4), two equivalent Fe(7), and two equivalent Fe(8) atoms. In the eighth Fe site, Fe(7) is bonded to one Ho(1), one Ho(2), one Fe(2), one Fe(3), two equivalent Fe(11), two equivalent Fe(4), two equivalent Fe(6), and two equivalent Fe(8) atoms to form distorted FeHo2Fe10 cuboctahedra that share corners with two equivalent Fe(4)Ho2Fe10 cuboctahedra, corners with two equivalent Fe(8)Ho2Fe10 cuboctahedra, corners with two equivalent Fe(10)Ho3Fe9 cuboctahedra, corners with three equivalent Fe(7)Ho2Fe10 cuboctahedra, corners with three equivalent Fe(9)Ho3Fe9 cuboctahedra, corners with four equivalent Fe(11)Ho2Fe10 cuboctahedra,  an edgeedge with one Fe(1)Ho2Fe10 cuboctahedra,  an edgeedge with one Fe(7)Ho2Fe10 cuboctahedra,  an edgeedge with one Fe(9)Ho3Fe9 cuboctahedra, edges with two equivalent Fe(8)Ho2Fe10 cuboctahedra, edges with two equivalent Fe(10)Ho3Fe9 cuboctahedra,  a faceface with one Fe(9)Ho3Fe9 cuboctahedra, faces with two equivalent Fe(11)Ho2Fe10 cuboctahedra, faces with two equivalent Fe(10)Ho3Fe9 cuboctahedra, faces with four equivalent Fe(8)Ho2Fe10 cuboctahedra, and faces with six equivalent Fe(4)Ho2Fe10 cuboctahedra. In the ninth Fe site, Fe(8) is bonded to one Ho(1), one Ho(2), one Fe(10), one Fe(11), one Fe(2), one Fe(3), one Fe(5), one Fe(6), one Fe(7), one Fe(9), and two equivalent Fe(4) atoms to form FeHo2Fe10 cuboctahedra that share  a cornercorner with one Fe(1)Ho2Fe10 cuboctahedra,  a cornercorner with one Fe(7)Ho2Fe10 cuboctahedra, corners with two equivalent Fe(11)Ho2Fe10 cuboctahedra, corners with two equivalent Fe(9)Ho3Fe9 cuboctahedra, corners with three equivalent Fe(4)Ho2Fe10 cuboctahedra, corners with four equivalent Fe(8)Ho2Fe10 cuboctahedra, corners with four equivalent Fe(10)Ho3Fe9 cuboctahedra,  an edgeedge with one Fe(11)Ho2Fe10 cuboctahedra,  an edgeedge with one Fe(7)Ho2Fe10 cuboctahedra,  an edgeedge with one Fe(8)Ho2Fe10 cuboctahedra,  an edgeedge with one Fe(9)Ho3Fe9 cuboctahedra, edges with two equivalent Fe(4)Ho2Fe10 cuboctahedra, edges with two equivalent Fe(10)Ho3Fe9 cuboctahedra,  a faceface with one Fe(1)Ho2Fe10 cuboctahedra,  a faceface with one Fe(9)Ho3Fe9 cuboctahedra, faces with two equivalent Fe(11)Ho2Fe10 cuboctahedra, faces with two equivalent Fe(7)Ho2Fe10 cuboctahedra, faces with two equivalent Fe(8)Ho2Fe10 cuboctahedra, faces with two equivalent Fe(10)Ho3Fe9 cuboctahedra, and faces with three equivalent Fe(4)Ho2Fe10 cuboctahedra. In the tenth Fe site, Fe(9) is bonded to one Ho(1), two equivalent Ho(2), one Fe(2), two equivalent Fe(10), two equivalent Fe(4), two equivalent Fe(5), and two equivalent Fe(8) atoms to form FeHo3Fe9 cuboctahedra that share  a cornercorner with one Fe(9)Ho3Fe9 cuboctahedra, corners with three equivalent Fe(1)Ho2Fe10 cuboctahedra, corners with three equivalent Fe(7)Ho2Fe10 cuboctahedra, corners with four equivalent Fe(4)Ho2Fe10 cuboctahedra, corners with four equivalent Fe(8)Ho2Fe10 cuboctahedra, corners with four equivalent Fe(10)Ho3Fe9 cuboctahedra,  an edgeedge with one Fe(7)Ho2Fe10 cuboctahedra,  an edgeedge with one Fe(9)Ho3Fe9 cuboctahedra, edges with two equivalent Fe(11)Ho2Fe10 cuboctahedra, edges with two equivalent Fe(8)Ho2Fe10 cuboctahedra, edges with two equivalent Fe(10)Ho3Fe9 cuboctahedra,  a faceface with one Fe(1)Ho2Fe10 cuboctahedra,  a faceface with one Fe(7)Ho2Fe10 cuboctahedra, faces with two equivalent Fe(11)Ho2Fe10 cuboctahedra, faces with two equivalent Fe(8)Ho2Fe10 cuboctahedra, faces with four equivalent Fe(4)Ho2Fe10 cuboctahedra, and faces with four equivalent Fe(10)Ho3Fe9 cuboctahedra. In the eleventh Fe site, Fe(10) is bonded to three equivalent Ho(2), one Fe(1), one Fe(10), one Fe(3), one Fe(4), one Fe(8), one Fe(9), and three equivalent Fe(5) atoms to form FeHo3Fe9 cuboctahedra that share  a cornercorner with one Fe(1)Ho2Fe10 cuboctahedra,  a cornercorner with one Fe(7)Ho2Fe10 cuboctahedra, corners with two equivalent Fe(11)Ho2Fe10 cuboctahedra, corners with two equivalent Fe(9)Ho3Fe9 cuboctahedra, corners with three equivalent Fe(4)Ho2Fe10 cuboctahedra, corners with four equivalent Fe(8)Ho2Fe10 cuboctahedra, corners with five equivalent Fe(10)Ho3Fe9 cuboctahedra,  an edgeedge with one Fe(1)Ho2Fe10 cuboctahedra,  an edgeedge with one Fe(4)Ho2Fe10 cuboctahedra,  an edgeedge with one Fe(7)Ho2Fe10 cuboctahedra,  an edgeedge with one Fe(9)Ho3Fe9 cuboctahedra, edges with two equivalent Fe(8)Ho2Fe10 cuboctahedra, edges with three equivalent Fe(10)Ho3Fe9 cuboctahedra,  a faceface with one Fe(1)Ho2Fe10 cuboctahedra,  a faceface with one Fe(7)Ho2Fe10 cuboctahedra, faces with two equivalent Fe(8)Ho2Fe10 cuboctahedra, faces with two equivalent Fe(9)Ho3Fe9 cuboctahedra, faces with three equivalent Fe(4)Ho2Fe10 cuboctahedra, and faces with four equivalent Fe(10)Ho3Fe9 cuboctahedra. is represented by the CIF file [CIF]
data_Ho3Fe29
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.340
_cell_length_b   6.340
_cell_length_c   10.407
_cell_angle_alpha   84.652
_cell_angle_beta   84.652
_cell_angle_gamma   82.415
_symmetry_Int_Tables_number   1
_cell_volume   411.439
_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
  Ho  Ho0  1  0.000  0.000  0.000  1.0
  Ho  Ho1  1  0.185  0.185  0.406  1.0
  Ho  Ho2  1  0.815  0.815  0.594  1.0
  Fe  Fe3  1  0.500  0.500  0.500  1.0
  Fe  Fe4  1  0.295  0.295  0.863  1.0
  Fe  Fe5  1  0.705  0.705  0.137  1.0
  Fe  Fe6  1  0.523  0.523  0.744  1.0
  Fe  Fe7  1  0.477  0.477  0.256  1.0
  Fe  Fe8  1  0.304  0.876  0.202  1.0
  Fe  Fe9  1  0.124  0.696  0.798  1.0
  Fe  Fe10  1  0.696  0.124  0.798  1.0
  Fe  Fe11  1  0.876  0.304  0.202  1.0
  Fe  Fe12  1  0.545  0.819  0.373  1.0
  Fe  Fe13  1  0.181  0.455  0.627  1.0
  Fe  Fe14  1  0.455  0.181  0.627  1.0
  Fe  Fe15  1  0.819  0.545  0.373  1.0
  Fe  Fe16  1  0.643  0.357  0.000  1.0
  Fe  Fe17  1  0.357  0.643  0.000  1.0
  Fe  Fe18  1  0.277  0.277  0.112  1.0
  Fe  Fe19  1  0.723  0.723  0.888  1.0
  Fe  Fe20  1  0.094  0.591  0.201  1.0
  Fe  Fe21  1  0.409  0.906  0.799  1.0
  Fe  Fe22  1  0.906  0.409  0.799  1.0
  Fe  Fe23  1  0.591  0.094  0.201  1.0
  Fe  Fe24  1  0.906  0.906  0.295  1.0
  Fe  Fe25  1  0.094  0.094  0.705  1.0
  Fe  Fe26  1  0.323  0.816  0.591  1.0
  Fe  Fe27  1  0.184  0.677  0.409  1.0
  Fe  Fe28  1  0.677  0.184  0.409  1.0
  Fe  Fe29  1  0.816  0.323  0.591  1.0
  Fe  Fe30  1  0.000  0.500  0.000  1.0
  Fe  Fe31  1  0.500  0.000  0.000  1.0
[/CIF]
.
The material structure described by Ho3Fe29 crystallizes in the monoclinic C2/m space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a 20-coordinate geometry to two equivalent Fe(2), two equivalent Fe(6), two equivalent Fe(7), two equivalent Fe(9), four equivalent Fe(11), four equivalent Fe(4), and four equivalent Fe(8) atoms. In the second Ho site, Ho(2) is bonded in a 19-coordinate geometry to one Fe(1), one Fe(3), one Fe(7), two equivalent Fe(4), two equivalent Fe(8), two equivalent Fe(9), four equivalent Fe(5), and six equivalent Fe(10) atoms. There are eleven inequivalent Fe sites. In the first Fe site, Fe(11) is bonded to two equivalent Ho(1), two equivalent Fe(2), two equivalent Fe(4), two equivalent Fe(6), two equivalent Fe(7), and two equivalent Fe(8) atoms to form FeHo2Fe10 cuboctahedra that share corners with two equivalent Fe(11)Ho2Fe10 cuboctahedra, corners with four equivalent Fe(4)Ho2Fe10 cuboctahedra, corners with four equivalent Fe(7)Ho2Fe10 cuboctahedra, corners with four equivalent Fe(8)Ho2Fe10 cuboctahedra, corners with four equivalent Fe(10)Ho3Fe9 cuboctahedra, edges with two equivalent Fe(11)Ho2Fe10 cuboctahedra, edges with two equivalent Fe(4)Ho2Fe10 cuboctahedra, edges with two equivalent Fe(8)Ho2Fe10 cuboctahedra, edges with two equivalent Fe(9)Ho3Fe9 cuboctahedra, faces with two equivalent Fe(11)Ho2Fe10 cuboctahedra, faces with two equivalent Fe(7)Ho2Fe10 cuboctahedra, faces with two equivalent Fe(9)Ho3Fe9 cuboctahedra, faces with four equivalent Fe(4)Ho2Fe10 cuboctahedra, and faces with four equivalent Fe(8)Ho2Fe10 cuboctahedra. In the second Fe site, Fe(1) is bonded to two equivalent Ho(2), two equivalent Fe(3), four equivalent Fe(10), and four equivalent Fe(5) atoms to form distorted FeHo2Fe10 cuboctahedra that share corners with four equivalent Fe(4)Ho2Fe10 cuboctahedra, corners with four equivalent Fe(8)Ho2Fe10 cuboctahedra, corners with four equivalent Fe(10)Ho3Fe9 cuboctahedra, corners with six equivalent Fe(9)Ho3Fe9 cuboctahedra, edges with two equivalent Fe(7)Ho2Fe10 cuboctahedra, edges with four equivalent Fe(10)Ho3Fe9 cuboctahedra, faces with two equivalent Fe(9)Ho3Fe9 cuboctahedra, faces with four equivalent Fe(4)Ho2Fe10 cuboctahedra, faces with four equivalent Fe(8)Ho2Fe10 cuboctahedra, and faces with four equivalent Fe(10)Ho3Fe9 cuboctahedra. In the third Fe site, Fe(2) is bonded in a 14-coordinate geometry to one Ho(1), one Fe(3), one Fe(7), one Fe(9), two equivalent Fe(11), two equivalent Fe(4), two equivalent Fe(5), two equivalent Fe(6), and two equivalent Fe(8) atoms. In the fourth Fe site, Fe(3) is bonded in a 14-coordinate geometry to one Ho(2), one Fe(1), one Fe(2), one Fe(7), two equivalent Fe(10), two equivalent Fe(4), two equivalent Fe(5), two equivalent Fe(6), and two equivalent Fe(8) atoms. In the fifth Fe site, Fe(4) is bonded to one Ho(1), one Ho(2), one Fe(10), one Fe(11), one Fe(2), one Fe(3), one Fe(5), one Fe(6), one Fe(7), one Fe(9), and two equivalent Fe(8) atoms to form distorted FeHo2Fe10 cuboctahedra that share  a cornercorner with one Fe(1)Ho2Fe10 cuboctahedra,  a cornercorner with one Fe(7)Ho2Fe10 cuboctahedra, corners with two equivalent Fe(11)Ho2Fe10 cuboctahedra, corners with two equivalent Fe(9)Ho3Fe9 cuboctahedra, corners with three equivalent Fe(8)Ho2Fe10 cuboctahedra, corners with three equivalent Fe(10)Ho3Fe9 cuboctahedra, corners with four equivalent Fe(4)Ho2Fe10 cuboctahedra,  an edgeedge with one Fe(11)Ho2Fe10 cuboctahedra,  an edgeedge with one Fe(10)Ho3Fe9 cuboctahedra, edges with two equivalent Fe(4)Ho2Fe10 cuboctahedra, edges with two equivalent Fe(8)Ho2Fe10 cuboctahedra,  a faceface with one Fe(1)Ho2Fe10 cuboctahedra,  a faceface with one Fe(4)Ho2Fe10 cuboctahedra, faces with two equivalent Fe(11)Ho2Fe10 cuboctahedra, faces with two equivalent Fe(9)Ho3Fe9 cuboctahedra, faces with three equivalent Fe(7)Ho2Fe10 cuboctahedra, faces with three equivalent Fe(8)Ho2Fe10 cuboctahedra, and faces with three equivalent Fe(10)Ho3Fe9 cuboctahedra. In the sixth Fe site, Fe(5) is bonded in a 12-coordinate geometry to two equivalent Ho(2), one Fe(1), one Fe(2), one Fe(3), one Fe(4), one Fe(5), one Fe(8), one Fe(9), and three equivalent Fe(10) atoms. In the seventh Fe site, Fe(6) is bonded in a 14-coordinate geometry to one Ho(1), one Fe(6), two equivalent Fe(11), two equivalent Fe(2), two equivalent Fe(3), two equivalent Fe(4), two equivalent Fe(7), and two equivalent Fe(8) atoms. In the eighth Fe site, Fe(7) is bonded to one Ho(1), one Ho(2), one Fe(2), one Fe(3), two equivalent Fe(11), two equivalent Fe(4), two equivalent Fe(6), and two equivalent Fe(8) atoms to form distorted FeHo2Fe10 cuboctahedra that share corners with two equivalent Fe(4)Ho2Fe10 cuboctahedra, corners with two equivalent Fe(8)Ho2Fe10 cuboctahedra, corners with two equivalent Fe(10)Ho3Fe9 cuboctahedra, corners with three equivalent Fe(7)Ho2Fe10 cuboctahedra, corners with three equivalent Fe(9)Ho3Fe9 cuboctahedra, corners with four equivalent Fe(11)Ho2Fe10 cuboctahedra,  an edgeedge with one Fe(1)Ho2Fe10 cuboctahedra,  an edgeedge with one Fe(7)Ho2Fe10 cuboctahedra,  an edgeedge with one Fe(9)Ho3Fe9 cuboctahedra, edges with two equivalent Fe(8)Ho2Fe10 cuboctahedra, edges with two equivalent Fe(10)Ho3Fe9 cuboctahedra,  a faceface with one Fe(9)Ho3Fe9 cuboctahedra, faces with two equivalent Fe(11)Ho2Fe10 cuboctahedra, faces with two equivalent Fe(10)Ho3Fe9 cuboctahedra, faces with four equivalent Fe(8)Ho2Fe10 cuboctahedra, and faces with six equivalent Fe(4)Ho2Fe10 cuboctahedra. In the ninth Fe site, Fe(8) is bonded to one Ho(1), one Ho(2), one Fe(10), one Fe(11), one Fe(2), one Fe(3), one Fe(5), one Fe(6), one Fe(7), one Fe(9), and two equivalent Fe(4) atoms to form FeHo2Fe10 cuboctahedra that share  a cornercorner with one Fe(1)Ho2Fe10 cuboctahedra,  a cornercorner with one Fe(7)Ho2Fe10 cuboctahedra, corners with two equivalent Fe(11)Ho2Fe10 cuboctahedra, corners with two equivalent Fe(9)Ho3Fe9 cuboctahedra, corners with three equivalent Fe(4)Ho2Fe10 cuboctahedra, corners with four equivalent Fe(8)Ho2Fe10 cuboctahedra, corners with four equivalent Fe(10)Ho3Fe9 cuboctahedra,  an edgeedge with one Fe(11)Ho2Fe10 cuboctahedra,  an edgeedge with one Fe(7)Ho2Fe10 cuboctahedra,  an edgeedge with one Fe(8)Ho2Fe10 cuboctahedra,  an edgeedge with one Fe(9)Ho3Fe9 cuboctahedra, edges with two equivalent Fe(4)Ho2Fe10 cuboctahedra, edges with two equivalent Fe(10)Ho3Fe9 cuboctahedra,  a faceface with one Fe(1)Ho2Fe10 cuboctahedra,  a faceface with one Fe(9)Ho3Fe9 cuboctahedra, faces with two equivalent Fe(11)Ho2Fe10 cuboctahedra, faces with two equivalent Fe(7)Ho2Fe10 cuboctahedra, faces with two equivalent Fe(8)Ho2Fe10 cuboctahedra, faces with two equivalent Fe(10)Ho3Fe9 cuboctahedra, and faces with three equivalent Fe(4)Ho2Fe10 cuboctahedra. In the tenth Fe site, Fe(9) is bonded to one Ho(1), two equivalent Ho(2), one Fe(2), two equivalent Fe(10), two equivalent Fe(4), two equivalent Fe(5), and two equivalent Fe(8) atoms to form FeHo3Fe9 cuboctahedra that share  a cornercorner with one Fe(9)Ho3Fe9 cuboctahedra, corners with three equivalent Fe(1)Ho2Fe10 cuboctahedra, corners with three equivalent Fe(7)Ho2Fe10 cuboctahedra, corners with four equivalent Fe(4)Ho2Fe10 cuboctahedra, corners with four equivalent Fe(8)Ho2Fe10 cuboctahedra, corners with four equivalent Fe(10)Ho3Fe9 cuboctahedra,  an edgeedge with one Fe(7)Ho2Fe10 cuboctahedra,  an edgeedge with one Fe(9)Ho3Fe9 cuboctahedra, edges with two equivalent Fe(11)Ho2Fe10 cuboctahedra, edges with two equivalent Fe(8)Ho2Fe10 cuboctahedra, edges with two equivalent Fe(10)Ho3Fe9 cuboctahedra,  a faceface with one Fe(1)Ho2Fe10 cuboctahedra,  a faceface with one Fe(7)Ho2Fe10 cuboctahedra, faces with two equivalent Fe(11)Ho2Fe10 cuboctahedra, faces with two equivalent Fe(8)Ho2Fe10 cuboctahedra, faces with four equivalent Fe(4)Ho2Fe10 cuboctahedra, and faces with four equivalent Fe(10)Ho3Fe9 cuboctahedra. In the eleventh Fe site, Fe(10) is bonded to three equivalent Ho(2), one Fe(1), one Fe(10), one Fe(3), one Fe(4), one Fe(8), one Fe(9), and three equivalent Fe(5) atoms to form FeHo3Fe9 cuboctahedra that share  a cornercorner with one Fe(1)Ho2Fe10 cuboctahedra,  a cornercorner with one Fe(7)Ho2Fe10 cuboctahedra, corners with two equivalent Fe(11)Ho2Fe10 cuboctahedra, corners with two equivalent Fe(9)Ho3Fe9 cuboctahedra, corners with three equivalent Fe(4)Ho2Fe10 cuboctahedra, corners with four equivalent Fe(8)Ho2Fe10 cuboctahedra, corners with five equivalent Fe(10)Ho3Fe9 cuboctahedra,  an edgeedge with one Fe(1)Ho2Fe10 cuboctahedra,  an edgeedge with one Fe(4)Ho2Fe10 cuboctahedra,  an edgeedge with one Fe(7)Ho2Fe10 cuboctahedra,  an edgeedge with one Fe(9)Ho3Fe9 cuboctahedra, edges with two equivalent Fe(8)Ho2Fe10 cuboctahedra, edges with three equivalent Fe(10)Ho3Fe9 cuboctahedra,  a faceface with one Fe(1)Ho2Fe10 cuboctahedra,  a faceface with one Fe(7)Ho2Fe10 cuboctahedra, faces with two equivalent Fe(8)Ho2Fe10 cuboctahedra, faces with two equivalent Fe(9)Ho3Fe9 cuboctahedra, faces with three equivalent Fe(4)Ho2Fe10 cuboctahedra, and faces with four equivalent Fe(10)Ho3Fe9 cuboctahedra. is represented by the CIF file [CIF]
data_Ho3Fe29
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.340
_cell_length_b   6.340
_cell_length_c   10.407
_cell_angle_alpha   84.652
_cell_angle_beta   84.652
_cell_angle_gamma   82.415
_symmetry_Int_Tables_number   1
_cell_volume   411.439
_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
  Ho  Ho0  1  0.000  0.000  0.000  1.0
  Ho  Ho1  1  0.185  0.185  0.406  1.0
  Ho  Ho2  1  0.815  0.815  0.594  1.0
  Fe  Fe3  1  0.500  0.500  0.500  1.0
  Fe  Fe4  1  0.295  0.295  0.863  1.0
  Fe  Fe5  1  0.705  0.705  0.137  1.0
  Fe  Fe6  1  0.523  0.523  0.744  1.0
  Fe  Fe7  1  0.477  0.477  0.256  1.0
  Fe  Fe8  1  0.304  0.876  0.202  1.0
  Fe  Fe9  1  0.124  0.696  0.798  1.0
  Fe  Fe10  1  0.696  0.124  0.798  1.0
  Fe  Fe11  1  0.876  0.304  0.202  1.0
  Fe  Fe12  1  0.545  0.819  0.373  1.0
  Fe  Fe13  1  0.181  0.455  0.627  1.0
  Fe  Fe14  1  0.455  0.181  0.627  1.0
  Fe  Fe15  1  0.819  0.545  0.373  1.0
  Fe  Fe16  1  0.643  0.357  0.000  1.0
  Fe  Fe17  1  0.357  0.643  0.000  1.0
  Fe  Fe18  1  0.277  0.277  0.112  1.0
  Fe  Fe19  1  0.723  0.723  0.888  1.0
  Fe  Fe20  1  0.094  0.591  0.201  1.0
  Fe  Fe21  1  0.409  0.906  0.799  1.0
  Fe  Fe22  1  0.906  0.409  0.799  1.0
  Fe  Fe23  1  0.591  0.094  0.201  1.0
  Fe  Fe24  1  0.906  0.906  0.295  1.0
  Fe  Fe25  1  0.094  0.094  0.705  1.0
  Fe  Fe26  1  0.323  0.816  0.591  1.0
  Fe  Fe27  1  0.184  0.677  0.409  1.0
  Fe  Fe28  1  0.677  0.184  0.409  1.0
  Fe  Fe29  1  0.816  0.323  0.591  1.0
  Fe  Fe30  1  0.000  0.500  0.000  1.0
  Fe  Fe31  1  0.500  0.000  0.000  1.0
[/CIF]
.