The structure described by U3Ho is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent U sites. In the first U site, U(1) is bonded to four equivalent U(1), four equivalent U(2), and four equivalent Ho(1) atoms to form UHo4U8 cuboctahedra that share corners with twelve equivalent U(1)Ho4U8 cuboctahedra, edges with eight equivalent U(1)Ho4U8 cuboctahedra, edges with eight equivalent U(2)Ho4U8 cuboctahedra, edges with eight equivalent Ho(1)U12 cuboctahedra, faces with four equivalent U(2)Ho4U8 cuboctahedra, faces with four equivalent Ho(1)U12 cuboctahedra, and faces with ten equivalent U(1)Ho4U8 cuboctahedra. In the second U site, U(2) is bonded to eight equivalent U(1) and four equivalent Ho(1) atoms to form distorted UHo4U8 cuboctahedra that share corners with four equivalent U(2)Ho4U8 cuboctahedra, corners with eight equivalent Ho(1)U12 cuboctahedra, edges with eight equivalent U(2)Ho4U8 cuboctahedra, edges with sixteen equivalent U(1)Ho4U8 cuboctahedra, faces with four equivalent U(2)Ho4U8 cuboctahedra, faces with six equivalent Ho(1)U12 cuboctahedra, and faces with eight equivalent U(1)Ho4U8 cuboctahedra. Ho(1) is bonded to four equivalent U(2) and eight equivalent U(1) atoms to form HoU12 cuboctahedra that share corners with four equivalent Ho(1)U12 cuboctahedra, corners with eight equivalent U(2)Ho4U8 cuboctahedra, edges with eight equivalent Ho(1)U12 cuboctahedra, edges with sixteen equivalent U(1)Ho4U8 cuboctahedra, faces with four equivalent Ho(1)U12 cuboctahedra, faces with six equivalent U(2)Ho4U8 cuboctahedra, and faces with eight equivalent U(1)Ho4U8 cuboctahedra. is represented by the CIF file [CIF]
data_HoU3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.671
_cell_length_b   5.671
_cell_length_c   5.671
_cell_angle_alpha   134.629
_cell_angle_beta   134.629
_cell_angle_gamma   66.107
_symmetry_Int_Tables_number   1
_cell_volume   90.937
_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
  U  U1  1  0.750  0.250  0.500  1.0
  U  U2  1  0.250  0.750  0.500  1.0
  U  U3  1  0.500  0.500  0.000  1.0
[/CIF]
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The structure described by U3Ho is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent U sites. In the first U site, U(1) is bonded to four equivalent U(1), four equivalent U(2), and four equivalent Ho(1) atoms to form UHo4U8 cuboctahedra that share corners with twelve equivalent U(1)Ho4U8 cuboctahedra, edges with eight equivalent U(1)Ho4U8 cuboctahedra, edges with eight equivalent U(2)Ho4U8 cuboctahedra, edges with eight equivalent Ho(1)U12 cuboctahedra, faces with four equivalent U(2)Ho4U8 cuboctahedra, faces with four equivalent Ho(1)U12 cuboctahedra, and faces with ten equivalent U(1)Ho4U8 cuboctahedra. In the second U site, U(2) is bonded to eight equivalent U(1) and four equivalent Ho(1) atoms to form distorted UHo4U8 cuboctahedra that share corners with four equivalent U(2)Ho4U8 cuboctahedra, corners with eight equivalent Ho(1)U12 cuboctahedra, edges with eight equivalent U(2)Ho4U8 cuboctahedra, edges with sixteen equivalent U(1)Ho4U8 cuboctahedra, faces with four equivalent U(2)Ho4U8 cuboctahedra, faces with six equivalent Ho(1)U12 cuboctahedra, and faces with eight equivalent U(1)Ho4U8 cuboctahedra. Ho(1) is bonded to four equivalent U(2) and eight equivalent U(1) atoms to form HoU12 cuboctahedra that share corners with four equivalent Ho(1)U12 cuboctahedra, corners with eight equivalent U(2)Ho4U8 cuboctahedra, edges with eight equivalent Ho(1)U12 cuboctahedra, edges with sixteen equivalent U(1)Ho4U8 cuboctahedra, faces with four equivalent Ho(1)U12 cuboctahedra, faces with six equivalent U(2)Ho4U8 cuboctahedra, and faces with eight equivalent U(1)Ho4U8 cuboctahedra. is represented by the CIF file [CIF]
data_HoU3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.671
_cell_length_b   5.671
_cell_length_c   5.671
_cell_angle_alpha   134.629
_cell_angle_beta   134.629
_cell_angle_gamma   66.107
_symmetry_Int_Tables_number   1
_cell_volume   90.937
_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
  U  U1  1  0.750  0.250  0.500  1.0
  U  U2  1  0.250  0.750  0.500  1.0
  U  U3  1  0.500  0.500  0.000  1.0
[/CIF]
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