The compound described by Ho3Nd is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded to four equivalent Ho(1), four equivalent Ho(2), and four equivalent Nd(1) atoms to form HoNd4Ho8 cuboctahedra that share corners with twelve equivalent Ho(1)Nd4Ho8 cuboctahedra, edges with eight equivalent Ho(1)Nd4Ho8 cuboctahedra, edges with eight equivalent Ho(2)Nd4Ho8 cuboctahedra, edges with eight equivalent Nd(1)Ho12 cuboctahedra, faces with four equivalent Ho(2)Nd4Ho8 cuboctahedra, faces with four equivalent Nd(1)Ho12 cuboctahedra, and faces with ten equivalent Ho(1)Nd4Ho8 cuboctahedra. In the second Ho site, Ho(2) is bonded to eight equivalent Ho(1) and four equivalent Nd(1) atoms to form HoNd4Ho8 cuboctahedra that share corners with four equivalent Ho(2)Nd4Ho8 cuboctahedra, corners with eight equivalent Nd(1)Ho12 cuboctahedra, edges with eight equivalent Ho(2)Nd4Ho8 cuboctahedra, edges with sixteen equivalent Ho(1)Nd4Ho8 cuboctahedra, faces with four equivalent Ho(2)Nd4Ho8 cuboctahedra, faces with six equivalent Nd(1)Ho12 cuboctahedra, and faces with eight equivalent Ho(1)Nd4Ho8 cuboctahedra. Nd(1) is bonded to four equivalent Ho(2) and eight equivalent Ho(1) atoms to form NdHo12 cuboctahedra that share corners with four equivalent Nd(1)Ho12 cuboctahedra, corners with eight equivalent Ho(2)Nd4Ho8 cuboctahedra, edges with eight equivalent Nd(1)Ho12 cuboctahedra, edges with sixteen equivalent Ho(1)Nd4Ho8 cuboctahedra, faces with four equivalent Nd(1)Ho12 cuboctahedra, faces with six equivalent Ho(2)Nd4Ho8 cuboctahedra, and faces with eight equivalent Ho(1)Nd4Ho8 cuboctahedra. is represented by the CIF card [CIF]
data_NdHo3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.175
_cell_length_b   6.175
_cell_length_c   6.175
_cell_angle_alpha   131.708
_cell_angle_beta   131.708
_cell_angle_gamma   70.691
_symmetry_Int_Tables_number   1
_cell_volume   128.540
_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
  Nd  Nd0  1  0.000  0.000  0.000  1.0
  Ho  Ho1  1  0.750  0.250  0.500  1.0
  Ho  Ho2  1  0.250  0.750  0.500  1.0
  Ho  Ho3  1  0.500  0.500  0.000  1.0
[/CIF]
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The compound described by Ho3Nd is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded to four equivalent Ho(1), four equivalent Ho(2), and four equivalent Nd(1) atoms to form HoNd4Ho8 cuboctahedra that share corners with twelve equivalent Ho(1)Nd4Ho8 cuboctahedra, edges with eight equivalent Ho(1)Nd4Ho8 cuboctahedra, edges with eight equivalent Ho(2)Nd4Ho8 cuboctahedra, edges with eight equivalent Nd(1)Ho12 cuboctahedra, faces with four equivalent Ho(2)Nd4Ho8 cuboctahedra, faces with four equivalent Nd(1)Ho12 cuboctahedra, and faces with ten equivalent Ho(1)Nd4Ho8 cuboctahedra. In the second Ho site, Ho(2) is bonded to eight equivalent Ho(1) and four equivalent Nd(1) atoms to form HoNd4Ho8 cuboctahedra that share corners with four equivalent Ho(2)Nd4Ho8 cuboctahedra, corners with eight equivalent Nd(1)Ho12 cuboctahedra, edges with eight equivalent Ho(2)Nd4Ho8 cuboctahedra, edges with sixteen equivalent Ho(1)Nd4Ho8 cuboctahedra, faces with four equivalent Ho(2)Nd4Ho8 cuboctahedra, faces with six equivalent Nd(1)Ho12 cuboctahedra, and faces with eight equivalent Ho(1)Nd4Ho8 cuboctahedra. Nd(1) is bonded to four equivalent Ho(2) and eight equivalent Ho(1) atoms to form NdHo12 cuboctahedra that share corners with four equivalent Nd(1)Ho12 cuboctahedra, corners with eight equivalent Ho(2)Nd4Ho8 cuboctahedra, edges with eight equivalent Nd(1)Ho12 cuboctahedra, edges with sixteen equivalent Ho(1)Nd4Ho8 cuboctahedra, faces with four equivalent Nd(1)Ho12 cuboctahedra, faces with six equivalent Ho(2)Nd4Ho8 cuboctahedra, and faces with eight equivalent Ho(1)Nd4Ho8 cuboctahedra. is represented by the CIF card [CIF]
data_NdHo3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.175
_cell_length_b   6.175
_cell_length_c   6.175
_cell_angle_alpha   131.708
_cell_angle_beta   131.708
_cell_angle_gamma   70.691
_symmetry_Int_Tables_number   1
_cell_volume   128.540
_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
  Nd  Nd0  1  0.000  0.000  0.000  1.0
  Ho  Ho1  1  0.750  0.250  0.500  1.0
  Ho  Ho2  1  0.250  0.750  0.500  1.0
  Ho  Ho3  1  0.500  0.500  0.000  1.0
[/CIF]
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