data_[Rb4Sr2Mg2Bi4]
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
  Mg  1.3100  1.5000  0.8600
  Bi  2.0200  1.6000  1.0350
]
_symmetry_space_group_name_H-M [Pmc2_1]
_cell_length_a [5.2574]
_cell_length_b [10.4989]
_cell_length_c [8.5228]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [26]
_chemical_formula_structural [Rb2SrMgBi2]
_chemical_formula_sum '[Rb4 Sr2 Mg2 Bi4]'
_cell_volume [470.4298]
_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  0.3389  0.1643  1.0
  Rb  Rb1  2  0.5000  0.4132  0.4815  1.0
  Sr  Sr2  2  0.0000  0.0407  0.5010  1.0
  Mg  Mg3  2  0.5000  0.1677  0.8439  1.0
  Bi  Bi4  2  0.0000  0.2990  0.7518  1.0
  Bi  Bi5  2  0.5000  0.1031  0.2119  1.0
]