data_[Rb4Mg2Ag2Br12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Mg  1.3100  1.5000  0.8600
  Ag  1.9300  1.6000  1.0867
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [I4/mmm]
_cell_length_a [7.7731]
_cell_length_b [7.7731]
_cell_length_c [10.7974]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [139]
_chemical_formula_structural [Rb2MgAgBr6]
_chemical_formula_sum '[Rb4 Mg2 Ag2 Br12]'
_cell_volume [652.3966]
_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  1.0
  Mg  Mg1  2  0.0000  0.0000  0.5000  1.0
  Ag  Ag2  2  0.0000  0.0000  0.0000  1.0
  Br  Br3  8  0.2422  0.2422  0.5000  1.0
  Br  Br4  4  0.0000  0.0000  0.2455  1.0
]