data_[Rb2Na4Se4]
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
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [5.0060]
_cell_length_b [5.1264]
_cell_length_c [11.9101]
_cell_angle_alpha [90.0000]
_cell_angle_beta [97.0259]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [Rb(NaSe)2]
_chemical_formula_sum '[Rb2 Na4 Se4]'
_cell_volume [303.3517]
_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  0.3109  0.7500  0.7316  1.0
  Na  Na1  2  0.1392  0.7500  0.1247  1.0
  Na  Na2  2  0.2508  0.2500  0.5002  1.0
  Se  Se3  2  0.2114  0.7500  0.3682  1.0
  Se  Se4  2  0.4076  0.2500  0.9967  1.0
]