data_[K8Sn8O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Sn  1.9600  1.4500  0.8300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [I2_13]
_cell_length_a [8.5142]
_cell_length_b [8.5142]
_cell_length_c [8.5142]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [199]
_chemical_formula_structural [K2Sn2O3]
_chemical_formula_sum '[K8 Sn8 O12]'
_cell_volume [617.2115]
_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
[
  K  K0  8  0.2409  0.2409  0.2409  1.0
  Sn  Sn1  8  0.0058  0.0058  0.0058  1.0
  O  O2  12  0.0000  0.2500  0.9793  1.0
]