data_[K4Sn6O16]
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 [C2/m]
_cell_length_a [13.5887]
_cell_length_b [6.2938]
_cell_length_c [5.6371]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.9454]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [K2Sn3O8]
_chemical_formula_sum '[K4 Sn6 O16]'
_cell_volume [453.1934]
_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
[
  K  K0  4  0.2257  0.5000  0.6954  1
  Sn  Sn1  4  0.0000  0.2550  0.0000  1
  Sn  Sn2  2  0.0000  0.0000  0.5000  1
  O  O3  8  0.0950  0.2070  0.3855  1
  O  O4  4  0.0846  0.0000  0.8966  1
  O  O5  4  0.0890  0.5000  0.9366  1
]