data_[K3Mg18Pb36]
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 [R-3]
_cell_length_a [15.0732]
_cell_length_b [15.0732]
_cell_length_c [8.3794]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [K(MgPb2)6]
_chemical_formula_sum '[K3 Mg18 Pb36]'
_cell_volume [1648.7479]
_cell_formula_units_Z [3]
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  3  0.0000  0.0000  0.0000  1
  Mg  Mg1  18  0.0303  0.7532  0.3252  1
  Pb  Pb2  18  0.0074  0.8615  0.6558  1
  Pb  Pb3  18  0.0597  0.5006  0.6749  1
]