data_[K2Ag1Pb1]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Ag  1.9300  1.6000  1.0867
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [P4mm]
_cell_length_a [3.9808]
_cell_length_b [3.9808]
_cell_length_c [10.1360]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [99]
_chemical_formula_structural [K2AgPb]
_chemical_formula_sum '[K2 Ag1 Pb1]'
_cell_volume [160.6255]
_cell_formula_units_Z [1]
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  1  0.0000  0.0000  0.9285  1
  K  K1  1  0.5000  0.5000  0.3179  1
  Ag  Ag2  1  0.5000  0.5000  0.6788  1
  Pb  Pb3  1  0.0000  0.0000  0.5749  1
]