data_[Na4Sn4O4]
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 [C2/m]
_cell_length_a [11.6566]
_cell_length_b [3.8013]
_cell_length_c [6.1097]
_cell_angle_alpha [90.0000]
_cell_angle_beta [120.0324]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [NaSnO]
_chemical_formula_sum '[Na4 Sn4 O4]'
_cell_volume [234.3780]
_cell_formula_units_Z [4]
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  0.1510  0.0000  0.4852  1
  Sn  Sn1  4  0.1018  0.5000  0.8856  1
  O  O2  4  0.1143  0.5000  0.2409  1
]