data_U3C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.85
_cell_length_b   4.85
_cell_length_c   4.85
_cell_angle_alpha   129.99
_cell_angle_beta   129.99
_cell_angle_gamma   73.41
_symmetry_Int_Tables_number   1
_chemical_formula_structural   U3C
_chemical_formula_sum   'U3 C1'
_cell_volume   65.3
_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
  U  U1  1  0.0  0.05  0.94  1.0
  U  U2  1  0.05  0.0  0.94  1.0
  U  U3  1  0.0  0.0  0.89  1.0
  C  C0  1  0.0  0.0  0.0  1.0

data_U3C
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.8
_cell_length_b   5.8
_cell_length_c   4.85
_cell_angle_alpha   90.0
_cell_angle_beta   126.71
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   U3C
_chemical_formula_sum   'U6 C2'
_cell_volume   130.6
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  U  U0  4  0.48  0.48  0.89  1.0
  U  U1  2  0.0  0.0  0.89  1.0
  C  C2  2  0.0  0.0  0.0  1.0

U U U C