data_[Ba2Na2Np4O16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ba  0.8900  2.1500  1.4900
  Na  0.9300  1.8000  1.1600
  Np  1.3600  1.7500  1.0000
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [I-4]
_cell_length_a [5.7062]
_cell_length_b [5.7062]
_cell_length_c [10.6426]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [82]
_chemical_formula_structural [BaNaNp2O8]
_chemical_formula_sum '[Ba2 Na2 Np4 O16]'
_cell_volume [346.5268]
_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
[
  Ba  Ba0  2  0.0000  0.5000  0.2500  1
  Na  Na1  2  0.0000  0.0000  0.0000  1
  Np  Np2  2  0.0000  0.0000  0.5000  1
  Np  Np3  2  0.0000  0.5000  0.7500  1
  O  O4  8  0.2027  0.7774  0.6019  1
  O  O5  8  0.2079  0.7086  0.8565  1
]