data_[Si4Ag8Pb4O16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Si  1.9000  1.1000  0.5400
  Ag  1.9300  1.6000  1.0867
  Pb  2.3300  1.8000  1.1225
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Fmm2]
_cell_length_a [6.4714]
_cell_length_b [7.6524]
_cell_length_c [9.9497]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [42]
_chemical_formula_structural [SiAg2PbO4]
_chemical_formula_sum '[Si4 Ag8 Pb4 O16]'
_cell_volume [492.7312]
_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
[
  Si  Si0  4  0.0000  0.0000  0.4906  1.0
  Ag  Ag1  8  0.2500  0.2500  0.2559  1.0
  Pb  Pb2  4  0.0000  0.0000  0.0430  1.0
  O  O3  8  0.0000  0.1781  0.5834  1.0
  O  O4  8  0.2123  0.0000  0.3941  1.0
]