data_[La2Er2Cu2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  La  1.1000  1.9500  1.1720
  Er  1.2400  1.7500  1.0300
  Cu  1.9000  1.3500  0.8200
]
_symmetry_space_group_name_H-M [I4mm]
_cell_length_a [3.5545]
_cell_length_b [3.5545]
_cell_length_c [12.5440]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [107]
_chemical_formula_structural [LaErCu]
_chemical_formula_sum '[La2 Er2 Cu2]'
_cell_volume [158.4895]
_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  2  0.0000  0.0000  0.0202  1.0
  Er  Er1  2  0.0000  0.0000  0.2972  1.0
  Cu  Cu2  2  0.0000  0.0000  0.6826  1.0
]