data_[Rb2Na2Sr2Br8]
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
  Sr  0.9500  2.0000  1.3200
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [7.9742]
_cell_length_b [7.7800]
_cell_length_c [9.1105]
_cell_angle_alpha [90.0000]
_cell_angle_beta [102.8574]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [RbNaSrBr4]
_chemical_formula_sum '[Rb2 Na2 Sr2 Br8]'
_cell_volume [551.0420]
_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  0.3632  0.7500  0.9171  1
  Na  Na1  2  0.1125  0.7500  0.3049  1
  Sr  Sr2  2  0.3346  0.2500  0.5416  1
  Br  Br3  4  0.3792  0.5024  0.2877  1
  Br  Br4  2  0.0522  0.7500  0.5975  1
  Br  Br5  2  0.2332  0.2500  0.8464  1
]