data_[Rb2Np1Se4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Np  1.3600  1.7500  1.0000
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2/m]
_cell_length_a [7.7108]
_cell_length_b [4.2654]
_cell_length_c [8.8264]
_cell_angle_alpha [90.0000]
_cell_angle_beta [114.8056]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [10]
_chemical_formula_structural [Rb2NpSe4]
_chemical_formula_sum '[Rb2 Np1 Se4]'
_cell_volume [263.5100]
_cell_formula_units_Z [1]
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  0.2204  0.5000  0.8317  1
  Np  Np1  1  0.5000  0.0000  0.5000  1
  Se  Se2  2  0.2529  0.5000  0.4503  1
  Se  Se3  2  0.4148  0.0000  0.1807  1
]