data_[Na4Mg2Pb4O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Mg  1.3100  1.5000  0.8600
  Pb  2.3300  1.8000  1.1225
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [5.6598]
_cell_length_b [9.8647]
_cell_length_c [5.9225]
_cell_angle_alpha [90.0000]
_cell_angle_beta [107.5226]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2Mg(PbO3)2]
_chemical_formula_sum '[Na4 Mg2 Pb4 O12]'
_cell_volume [315.3211]
_cell_formula_units_Z [2]
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
[
  Na  Na0  4  0.0000  0.1628  0.0000  1.0
  Mg  Mg1  2  0.0000  0.0000  0.5000  1.0
  Pb  Pb2  4  0.0000  0.3353  0.5000  1.0
  O  O3  8  0.2253  0.1696  0.7072  1.0
  O  O4  4  0.2471  0.5000  0.6944  1.0
]