data_[K8Mg12Sn20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Mg  1.3100  1.5000  0.8600
  Sn  1.9600  1.4500  0.8300
]
_symmetry_space_group_name_H-M [Ibam]
_cell_length_a [12.5861]
_cell_length_b [14.3851]
_cell_length_c [6.7811]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [72]
_chemical_formula_structural [K2Mg3Sn5]
_chemical_formula_sum '[K8 Mg12 Sn20]'
_cell_volume [1227.7335]
_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  0.2435  0.3727  0.5000  1.0
  Mg  Mg1  8  0.1292  0.3743  0.0000  1.0
  Mg  Mg2  4  0.0000  0.0000  0.2500  1.0
  Sn  Sn3  8  0.0000  0.2402  0.2500  1.0
  Sn  Sn4  8  0.1414  0.1158  0.5000  1.0
  Sn  Sn5  4  0.0000  0.5000  0.2500  1.0
]