data_[Np4Pb8O28]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Np  1.3600  1.7500  1.0000
  Pb  2.3300  1.8000  1.1225
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [13.6539]
_cell_length_b [5.9882]
_cell_length_c [8.2849]
_cell_angle_alpha [90.0000]
_cell_angle_beta [105.9756]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [NpPb2O7]
_chemical_formula_sum '[Np4 Pb8 O28]'
_cell_volume [651.2352]
_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
[
  Np  Np0  4  0.0000  0.0871  0.2500  1
  Pb  Pb1  8  0.2451  0.0079  0.6013  1
  O  O2  8  0.0748  0.1250  0.0931  1
  O  O3  8  0.1355  0.2596  0.4302  1
  O  O4  8  0.2258  0.1495  0.8398  1
  O  O5  4  0.0000  0.2244  0.7500  1
]