The material structure described by U3La crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent U sites. In the first U site, U(1) is bonded to eight equivalent U(1) and four equivalent La(1) atoms to form distorted ULa4U8 cuboctahedra that share corners with four equivalent La(1)U12 cuboctahedra; corners with fourteen equivalent U(1)La4U8 cuboctahedra; edges with six equivalent La(1)U12 cuboctahedra; edges with twelve equivalent U(1)La4U8 cuboctahedra; faces with four equivalent La(1)U12 cuboctahedra; and faces with sixteen U(1,1)La4U8 cuboctahedra. In the second U site, U(1) is bonded to eight equivalent U(1) and four equivalent La(1) atoms to form distorted ULa4U8 cuboctahedra that share corners with four equivalent La(1)U12 cuboctahedra; corners with fourteen U(1,1)La4U8 cuboctahedra; edges with six equivalent La(1)U12 cuboctahedra; edges with twelve equivalent U(1)La4U8 cuboctahedra; faces with four equivalent La(1)U12 cuboctahedra; and faces with sixteen U(1,1)La4U8 cuboctahedra. La(1) is bonded to twelve U(1,1) atoms to form LaU12 cuboctahedra that share corners with six equivalent La(1)U12 cuboctahedra; corners with twelve U(1,1)La4U8 cuboctahedra; edges with eighteen U(1,1)La4U8 cuboctahedra; faces with eight equivalent La(1)U12 cuboctahedra; and faces with twelve U(1,1)La4U8 cuboctahedra. is represented by the CIF file [CIF]
data_LaU3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.305
_cell_length_b   6.305
_cell_length_c   5.515
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   189.827
_cell_formula_units_Z   2
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
  La  La0  1  0.333  0.667  0.750  1.0
  La  La1  1  0.667  0.333  0.250  1.0
  U  U2  1  0.151  0.303  0.250  1.0
  U  U3  1  0.697  0.849  0.250  1.0
  U  U4  1  0.151  0.849  0.250  1.0
  U  U5  1  0.849  0.697  0.750  1.0
  U  U6  1  0.303  0.151  0.750  1.0
  U  U7  1  0.849  0.151  0.750  1.0
[/CIF]
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The material structure described by U3La crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent U sites. In the first U site, U(1) is bonded to eight equivalent U(1) and four equivalent La(1) atoms to form distorted ULa4U8 cuboctahedra that share corners with four equivalent La(1)U12 cuboctahedra; corners with fourteen equivalent U(1)La4U8 cuboctahedra; edges with six equivalent La(1)U12 cuboctahedra; edges with twelve equivalent U(1)La4U8 cuboctahedra; faces with four equivalent La(1)U12 cuboctahedra; and faces with sixteen U(1,1)La4U8 cuboctahedra. In the second U site, U(1) is bonded to eight equivalent U(1) and four equivalent La(1) atoms to form distorted ULa4U8 cuboctahedra that share corners with four equivalent La(1)U12 cuboctahedra; corners with fourteen U(1,1)La4U8 cuboctahedra; edges with six equivalent La(1)U12 cuboctahedra; edges with twelve equivalent U(1)La4U8 cuboctahedra; faces with four equivalent La(1)U12 cuboctahedra; and faces with sixteen U(1,1)La4U8 cuboctahedra. La(1) is bonded to twelve U(1,1) atoms to form LaU12 cuboctahedra that share corners with six equivalent La(1)U12 cuboctahedra; corners with twelve U(1,1)La4U8 cuboctahedra; edges with eighteen U(1,1)La4U8 cuboctahedra; faces with eight equivalent La(1)U12 cuboctahedra; and faces with twelve U(1,1)La4U8 cuboctahedra. is represented by the CIF file [CIF]
data_LaU3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.305
_cell_length_b   6.305
_cell_length_c   5.515
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   189.827
_cell_formula_units_Z   2
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
  La  La0  1  0.333  0.667  0.750  1.0
  La  La1  1  0.667  0.333  0.250  1.0
  U  U2  1  0.151  0.303  0.250  1.0
  U  U3  1  0.697  0.849  0.250  1.0
  U  U4  1  0.151  0.849  0.250  1.0
  U  U5  1  0.849  0.697  0.750  1.0
  U  U6  1  0.303  0.151  0.750  1.0
  U  U7  1  0.849  0.151  0.750  1.0
[/CIF]
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