data_[Na4Bi2Sb2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Bi  2.0200  1.6000  1.0350
  Sb  2.0500  1.4500  0.8300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Pmn2_1]
_cell_length_a [7.5153]
_cell_length_b [6.9487]
_cell_length_c [5.5025]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [31]
_chemical_formula_structural [Na2BiSbO4]
_chemical_formula_sum '[Na4 Bi2 Sb2 O8]'
_cell_volume [287.3500]
_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  0.2476  0.6529  0.9275  1.0
  Bi  Bi1  2  0.0000  0.1592  0.9289  1.0
  Sb  Sb2  2  0.0000  0.8491  0.4478  1.0
  O  O3  4  0.2269  0.6817  0.4535  1.0
  O  O4  2  0.0000  0.1807  0.5470  1.0
  O  O5  2  0.0000  0.8445  0.8143  1.0
]