data_[Er2Bi2N4O2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Er  1.2400  1.7500  1.0300
  Bi  2.0200  1.6000  1.0350
  N  3.0400  0.6500  0.6300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Pmma]
_cell_length_a [5.8641]
_cell_length_b [4.0151]
_cell_length_c [6.2686]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [51]
_chemical_formula_structural [ErBiN2O]
_chemical_formula_sum '[Er2 Bi2 N4 O2]'
_cell_volume [147.5949]
_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  0.2500  0.5000  0.8162  1
  Bi  Bi1  2  0.2500  0.0000  0.2706  1
  N  N2  2  0.0000  0.0000  0.5000  1
  N  N3  2  0.2500  0.5000  0.1640  1
  O  O4  2  0.0000  0.0000  0.0000  1
]