data_[Mg2Nb2Pb4O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Mg  1.3100  1.5000  0.8600
  Nb  1.6000  1.4500  0.8200
  Pb  2.3300  1.8000  1.1225
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/c]
_cell_length_a [5.6765]
_cell_length_b [5.7712]
_cell_length_c [9.8848]
_cell_angle_alpha [90.0000]
_cell_angle_beta [125.0877]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [MgNb(PbO3)2]
_chemical_formula_sum '[Mg2 Nb2 Pb4 O12]'
_cell_volume [264.9829]
_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
[
  Mg  Mg0  2  0.5000  0.0000  0.0000  1.0
  Nb  Nb1  2  0.0000  0.0000  0.5000  1.0
  Pb  Pb2  4  0.2444  0.0355  0.2506  1.0
  O  O3  4  0.1552  0.2138  0.9571  1.0
  O  O4  4  0.2477  0.7007  0.9601  1.0
  O  O5  4  0.3257  0.0225  0.7439  1.0
]