data_[Tb4Er4Cu4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tb  1.1000  1.7500  0.9815
  Er  1.2400  1.7500  1.0300
  Cu  1.9000  1.3500  0.8200
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [12.5141]
_cell_length_b [3.6802]
_cell_length_c [8.0670]
_cell_angle_alpha [90.0000]
_cell_angle_beta [126.6391]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [TbErCu]
_chemical_formula_sum '[Tb4 Er4 Cu4]'
_cell_volume [298.1157]
_cell_formula_units_Z [4]
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
[
  Tb  Tb0  4  0.1566  0.5000  0.5635  1
  Er  Er1  4  0.0973  0.0000  0.8873  1
  Cu  Cu2  4  0.1208  0.5000  0.1724  1
]