data_[Rb2Na2Np2O6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  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 [P2_1/m]
_cell_length_a [6.9505]
_cell_length_b [3.5917]
_cell_length_c [9.4042]
_cell_angle_alpha [90.0000]
_cell_angle_beta [105.9079]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [RbNaNpO3]
_chemical_formula_sum '[Rb2 Na2 Np2 O6]'
_cell_volume [225.7776]
_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
[
  Rb  Rb0  2  0.3793  0.7500  0.3200  1
  Na  Na1  2  0.3248  0.2500  0.9606  1
  Np  Np2  2  0.1184  0.7500  0.6655  1
  O  O3  2  0.0315  0.2500  0.7744  1
  O  O4  2  0.1815  0.2500  0.5182  1
  O  O5  2  0.4064  0.7500  0.8211  1
]