data_[Rb2Se2Cl8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Se  2.5500  1.1500  1.0133
  Cl  3.1600  1.0000  0.7800
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [8.7309]
_cell_length_b [7.6217]
_cell_length_c [7.1792]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.9562]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [RbSeCl4]
_chemical_formula_sum '[Rb2 Se2 Cl8]'
_cell_volume [449.0487]
_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  0.0000  0.5000  0.0000  1
  Se  Se1  2  0.0000  0.0000  0.5000  1
  Cl  Cl2  8  0.1541  0.2216  0.7203  1
]