data_[Rb4Nd4Np2Se12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Nd  1.1400  1.8500  1.2765
  Np  1.3600  1.7500  1.0000
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [7.4503]
_cell_length_b [12.8280]
_cell_length_c [8.5647]
_cell_angle_alpha [90.0000]
_cell_angle_beta [107.2404]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb2Nd2NpSe6]
_chemical_formula_sum '[Rb4 Nd4 Np2 Se12]'
_cell_volume [781.7689]
_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  4  0.0000  0.1700  0.0000  1
  Nd  Nd1  4  0.0000  0.3337  0.5000  1
  Np  Np2  2  0.0000  0.0000  0.5000  1
  Se  Se3  8  0.2259  0.1607  0.6938  1
  Se  Se4  4  0.2479  0.5000  0.6932  1
]