data_[Na2Bi4As2O12]
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
  As  2.1800  1.1500  0.6600
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/c]
_cell_length_a [5.3763]
_cell_length_b [6.2170]
_cell_length_c [9.6499]
_cell_angle_alpha [90.0000]
_cell_angle_beta [123.3775]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [NaBi2AsO6]
_chemical_formula_sum '[Na2 Bi4 As2 O12]'
_cell_volume [269.3462]
_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  0.5000  0.0000  0.0000  1
  Bi  Bi1  4  0.2884  0.0698  0.2762  1
  As  As2  2  0.0000  0.0000  0.5000  1
  O  O3  4  0.1276  0.0719  0.7191  1
  O  O4  4  0.2512  0.7392  0.0788  1
  O  O5  4  0.3166  0.1598  0.5169  1
]