data_[Rb2Na2W2Se8]
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
  W  2.3600  1.3500  0.7667
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.9372]
_cell_length_b [7.3717]
_cell_length_c [9.5476]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.1149]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [RbNaWSe4]
_chemical_formula_sum '[Rb2 Na2 W2 Se8]'
_cell_volume [464.0539]
_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  0.2688  0.2500  0.0726  1
  Na  Na1  2  0.2315  0.2500  0.5483  1
  W  W2  2  0.2033  0.7500  0.3159  1
  Se  Se3  4  0.0116  0.5040  0.7287  1
  Se  Se4  2  0.3999  0.7500  0.5621  1
  Se  Se5  2  0.4022  0.7500  0.1566  1
]