data_[K2Sr4Sn16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Sr  0.9500  2.0000  1.3200
  Sn  1.9600  1.4500  0.8300
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [9.0119]
_cell_length_b [16.2981]
_cell_length_c [6.3610]
_cell_angle_alpha [90.0000]
_cell_angle_beta [130.9430]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [K(SrSn4)2]
_chemical_formula_sum '[K2 Sr4 Sn16]'
_cell_volume [705.7176]
_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  2  0.0000  0.0000  0.5000  1
  Sr  Sr1  4  0.0000  0.3106  0.0000  1
  Sn  Sn2  8  0.2423  0.1240  0.2678  1
  Sn  Sn3  4  0.0000  0.2211  0.5000  1
  Sn  Sn4  4  0.0063  0.5000  0.7595  1
]