data_[Er4Nb4N4O4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Er  1.2400  1.7500  1.0300
  Nb  1.6000  1.4500  0.8200
  N  3.0400  0.6500  0.6300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Amm2]
_cell_length_a [3.1571]
_cell_length_b [6.8152]
_cell_length_c [11.4099]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [38]
_chemical_formula_structural [ErNbNO]
_chemical_formula_sum '[Er4 Nb4 N4 O4]'
_cell_volume [245.5003]
_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
[
  Er  Er0  2  0.0000  0.0000  0.7039  1
  Er  Er1  2  0.5000  0.0000  0.2036  1
  Nb  Nb2  4  0.0000  0.2142  0.4634  1
  N  N3  2  0.0000  0.0000  0.3487  1
  N  N4  2  0.5000  0.0000  0.5432  1
  O  O5  4  0.0000  0.2031  0.1368  1
]