data_[Pm6Np4O18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Np  1.3600  1.7500  1.0000
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [I-4m2]
_cell_length_a [3.9380]
_cell_length_b [3.9380]
_cell_length_c [27.8822]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [119]
_chemical_formula_structural [Pm3Np2O9]
_chemical_formula_sum '[Pm6 Np4 O18]'
_cell_volume [432.3927]
_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
[
  Pm  Pm0  4  0.0000  0.5000  0.6580  1
  Pm  Pm1  2  0.0000  0.5000  0.2500  1
  Np  Np2  4  0.0000  0.5000  0.0544  1
  O  O3  4  0.0000  0.0000  0.0776  1
  O  O4  4  0.0000  0.0000  0.1950  1
  O  O5  4  0.0000  0.0000  0.2999  1
  O  O6  4  0.0000  0.0000  0.4064  1
  O  O7  2  0.0000  0.0000  0.5000  1
]