data_[Rb4Mg2Bi4]
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
  Bi  2.0200  1.6000  1.0350
]
_symmetry_space_group_name_H-M [P4/mbm]
_cell_length_a [11.3996]
_cell_length_b [11.3996]
_cell_length_c [3.2632]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [127]
_chemical_formula_structural [Rb2MgBi2]
_chemical_formula_sum '[Rb4 Mg2 Bi4]'
_cell_volume [424.0575]
_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  0.1229  0.3771  0.0000  1
  Mg  Mg1  2  0.0000  0.0000  0.0000  1
  Bi  Bi2  4  0.1757  0.6757  0.5000  1
]