data_[Na12Sn2O10]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sn  1.9600  1.4500  0.8300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [I4mm]
_cell_length_a [7.6901]
_cell_length_b [7.6901]
_cell_length_c [5.5612]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [107]
_chemical_formula_structural [Na6SnO5]
_chemical_formula_sum '[Na12 Sn2 O10]'
_cell_volume [328.8723]
_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  8  0.1983  0.8017  0.4083  1.0
  Na  Na1  4  0.0000  0.5000  0.2967  1.0
  Sn  Sn2  2  0.0000  0.0000  0.9638  1.0
  O  O3  8  0.0000  0.2651  0.0601  1.0
  O  O4  2  0.0000  0.0000  0.5992  1.0
]