data_[Rb4Sr2Sb2Br12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Sr  0.9500  2.0000  1.3200
  Sb  2.0500  1.4500  0.8300
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [I4/mmm]
_cell_length_a [8.2181]
_cell_length_b [8.2181]
_cell_length_c [12.9663]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [139]
_chemical_formula_structural [Rb2SrSbBr6]
_chemical_formula_sum '[Rb4 Sr2 Sb2 Br12]'
_cell_volume [875.7126]
_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  4  0.0000  0.5000  0.2500  1
  Sr  Sr1  2  0.0000  0.0000  0.5000  1
  Sb  Sb2  2  0.0000  0.0000  0.0000  1
  Br  Br3  8  0.2410  0.2410  0.0000  1
  Br  Br4  4  0.0000  0.0000  0.2700  1
]