data_[Na4Er2Ir2O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Er  1.2400  1.7500  1.0300
  Ir  2.2000  1.3500  0.7650
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/c]
_cell_length_a [5.6188]
_cell_length_b [5.7102]
_cell_length_c [9.7727]
_cell_angle_alpha [90.0000]
_cell_angle_beta [124.7831]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [Na2ErIrO6]
_chemical_formula_sum '[Na4 Er2 Ir2 O12]'
_cell_volume [257.5254]
_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
[
  Na  Na0  4  0.2428  0.0354  0.2501  1.0
  Er  Er1  2  0.5000  0.0000  0.0000  1.0
  Ir  Ir2  2  0.0000  0.0000  0.5000  1.0
  O  O3  4  0.1406  0.2250  0.9556  1.0
  O  O4  4  0.2345  0.6893  0.9593  1.0
  O  O5  4  0.3122  0.0219  0.7309  1.0
]