data_[Na2Ca2Nb6Bi4O24]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ca  1.0000  1.8000  1.1400
  Nb  1.6000  1.4500  0.8200
  Bi  2.0200  1.6000  1.0350
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [I4mm]
_cell_length_a [3.9553]
_cell_length_b [3.9553]
_cell_length_c [32.7097]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [107]
_chemical_formula_structural [NaCaNb3(BiO6)2]
_chemical_formula_sum '[Na2 Ca2 Nb6 Bi4 O24]'
_cell_volume [511.7171]
_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  2  0.0000  0.0000  0.0689  1.0
  Ca  Ca1  2  0.0000  0.0000  0.9364  1.0
  Nb  Nb2  2  0.0000  0.0000  0.3725  1.0
  Nb  Nb3  2  0.0000  0.0000  0.5018  1.0
  Nb  Nb4  2  0.0000  0.0000  0.6292  1.0
  Bi  Bi5  2  0.0000  0.0000  0.2122  1.0
  Bi  Bi6  2  0.0000  0.0000  0.7862  1.0
  O  O7  4  0.0000  0.5000  0.1226  1.0
  O  O8  4  0.0000  0.5000  0.2494  1.0
  O  O9  4  0.0000  0.5000  0.3798  1.0
  O  O10  4  0.0000  0.5000  0.4952  1.0
  O  O11  2  0.0000  0.0000  0.3145  1.0
  O  O12  2  0.0000  0.0000  0.4374  1.0
  O  O13  2  0.0000  0.0000  0.5599  1.0
  O  O14  2  0.0000  0.0000  0.6870  1.0
]