data_[K8Mg12Pb16]
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
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [Cmce]
_cell_length_a [6.9265]
_cell_length_b [18.7324]
_cell_length_c [8.9408]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [64]
_chemical_formula_structural [K2Mg3Pb4]
_chemical_formula_sum '[K8 Mg12 Pb16]'
_cell_volume [1160.0629]
_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  0.0000  0.1023  0.6037  1.0
  Mg  Mg1  8  0.2500  0.2308  0.2500  1.0
  Mg  Mg2  4  0.0000  0.0000  0.0000  1.0
  Pb  Pb3  8  0.0000  0.1765  0.9994  1.0
  Pb  Pb4  8  0.2500  0.0665  0.2500  1.0
]