data_[Rb2Na2Br2Cl2]
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
  Br  2.9600  1.1500  0.8825
  Cl  3.1600  1.0000  0.7800
]
_symmetry_space_group_name_H-M [P4/nmm]
_cell_length_a [5.3795]
_cell_length_b [5.3795]
_cell_length_c [10.0364]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [129]
_chemical_formula_structural [RbNaBrCl]
_chemical_formula_sum '[Rb2 Na2 Br2 Cl2]'
_cell_volume [290.4481]
_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  0.8218  1
  Na  Na1  2  0.0000  0.5000  0.4009  1
  Br  Br2  2  0.0000  0.0000  0.5000  1
  Cl  Cl3  2  0.0000  0.5000  0.1393  1
]