data_Y(MgCu)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.74
_cell_length_b   4.74
_cell_length_c   5.27
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Y(MgCu)2
_chemical_formula_sum   'Y1 Mg2 Cu2'
_cell_volume   102.52
_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
  Y  Y4  1  0.0  0.0  0.0  1.0
  Mg  Mg2  1  0.0  0.74  0.32  1.0
  Mg  Mg3  1  0.37  0.37  0.95  1.0
  Cu  Cu0  1  0.0  0.74  0.69  1.0
  Cu  Cu1  1  0.37  0.37  0.58  1.0

data_Y(MgCu)2
_symmetry_space_group_name_H-M   P1
_cell_length_a   4.74
_cell_length_b   4.74
_cell_length_c   5.27
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Y(MgCu)2
_chemical_formula_sum   'Y1 Mg2 Cu2'
_cell_volume   102.52
_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
  Y  Y0  1  0.0  0.0  0.0  1.0
  Mg  Mg1  1  0.0  0.74  0.32  1.0
  Mg  Mg2  1  0.37  0.37  0.95  1.0
  Cu  Cu3  1  0.0  0.74  0.69  1.0
  Cu  Cu4  1  0.37  0.37  0.58  1.0

Y Mg Mg Cu Cu