data_[Na2Al8O14]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Al  1.6100  1.2500  0.6750
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Pmn2_1]
_cell_length_a [13.1381]
_cell_length_b [5.4053]
_cell_length_c [5.0679]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [31]
_chemical_formula_structural [NaAl4O7]
_chemical_formula_sum '[Na2 Al8 O14]'
_cell_volume [359.8940]
_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  0.1765  0.3086  1
  Al  Al1  4  0.1221  0.6755  0.5657  1
  Al  Al2  4  0.2485  0.1674  0.5616  1
  O  O3  4  0.1422  0.7286  0.9020  1
  O  O4  4  0.1445  0.3617  0.5047  1
  O  O5  4  0.2150  0.8774  0.4019  1
  O  O6  2  0.0000  0.7735  0.4745  1
]