data_YCu2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.04
_cell_length_b   5.04
_cell_length_c   6.66
_cell_angle_alpha   95.74
_cell_angle_beta   95.74
_cell_angle_gamma   41.85
_symmetry_Int_Tables_number   1
_chemical_formula_structural   YCu2
_chemical_formula_sum   'Y2 Cu4'
_cell_volume   112.23
_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
  Y  Y4  1  0.6  0.0  0.74  1.0
  Y  Y5  1  0.38  0.0  0.21  1.0
  Cu  Cu0  1  0.44  0.0  0.87  1.0
  Cu  Cu1  1  0.25  0.0  0.35  1.0
  Cu  Cu2  1  0.26  0.0  0.97  1.0
  Cu  Cu3  1  0.43  0.0  0.64  1.0

data_YCu2
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.6
_cell_length_b   5.04
_cell_length_c   6.66
_cell_angle_alpha   95.74
_cell_angle_beta   90.0
_cell_angle_gamma   110.93
_symmetry_Int_Tables_number   1
_chemical_formula_structural   YCu2
_chemical_formula_sum   'Y2 Cu4'
_cell_volume   112.23
_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
  Y  Y0  1  0.0  0.4  0.26  1.0
  Y  Y1  1  0.0  0.62  0.79  1.0
  Cu  Cu2  1  0.0  0.56  0.13  1.0
  Cu  Cu3  1  0.0  0.57  0.36  1.0
  Cu  Cu4  1  0.0  0.74  0.03  1.0
  Cu  Cu5  1  0.0  0.75  0.65  1.0

Y Y Cu Cu Cu Cu