data_[Yb2Er2Cu4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Yb  1.1000  1.7500  1.0840
  Er  1.2400  1.7500  1.0300
  Cu  1.9000  1.3500  0.8200
]
_symmetry_space_group_name_H-M [Pmc2_1]
_cell_length_a [4.4070]
_cell_length_b [5.4153]
_cell_length_c [7.0582]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [26]
_chemical_formula_structural [YbErCu2]
_chemical_formula_sum '[Yb2 Er2 Cu4]'
_cell_volume [168.4489]
_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
[
  Yb  Yb0  2  0.5000  0.3842  0.8183  1
  Er  Er1  2  0.0000  0.1118  0.1829  1
  Cu  Cu2  2  0.0000  0.3744  0.5321  1
  Cu  Cu3  2  0.5000  0.1221  0.4666  1
]