data_[Rb4Na8P4Se16]
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
  P  2.1900  1.0000  0.5500
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [13.7085]
_cell_length_b [10.3403]
_cell_length_c [9.4345]
_cell_angle_alpha [90.0000]
_cell_angle_beta [131.5762]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [RbNa2PSe4]
_chemical_formula_sum '[Rb4 Na8 P4 Se16]'
_cell_volume [1000.4278]
_cell_formula_units_Z [4]
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  0.2500  0.2500  0.5000  1
  Na  Na1  4  0.0000  0.5000  0.0000  1
  Na  Na2  4  0.2500  0.2500  0.0000  1
  P  P3  4  0.0000  0.0000  0.0000  1
  Se  Se4  8  0.0378  0.2222  0.5762  1
  Se  Se5  8  0.2264  0.0367  0.1870  1
]