data_[Er4Cu2Sb2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Er  1.2400  1.7500  1.0300
  Cu  1.9000  1.3500  0.8200
  Sb  2.0500  1.4500  0.8300
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [5.9580]
_cell_length_b [4.0913]
_cell_length_c [8.2315]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.7855]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [Er2CuSb]
_chemical_formula_sum '[Er4 Cu2 Sb2]'
_cell_volume [188.8098]
_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
[
  Er  Er0  2  0.2388  0.7500  0.4426  1.0
  Er  Er1  2  0.3110  0.2500  0.0893  1.0
  Cu  Cu2  2  0.3616  0.2500  0.7084  1.0
  Sb  Sb3  2  0.1230  0.7500  0.7913  1.0
]