data_[Na4Sr6Np2O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sr  0.9500  2.0000  1.3200
  Np  1.3600  1.7500  1.0000
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [6.2120]
_cell_length_b [10.7275]
_cell_length_c [6.1004]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.6883]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2Sr3NpO6]
_chemical_formula_sum '[Na4 Sr6 Np2 O12]'
_cell_volume [382.7612]
_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  0.3339  0.0000  1
  Sr  Sr1  4  0.0000  0.1737  0.5000  1
  Sr  Sr2  2  0.0000  0.5000  0.5000  1
  Np  Np3  2  0.0000  0.0000  0.0000  1
  O  O4  8  0.2300  0.1498  0.2399  1
  O  O5  4  0.2136  0.0000  0.7651  1
]