data_[Rb8Na4Sb8Pb4]
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
  Sb  2.0500  1.4500  0.8300
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [Ibam]
_cell_length_a [7.4329]
_cell_length_b [17.2092]
_cell_length_c [7.4809]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [72]
_chemical_formula_structural [Rb2NaSb2Pb]
_chemical_formula_sum '[Rb8 Na4 Sb8 Pb4]'
_cell_volume [956.9172]
_cell_formula_units_Z [4]
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  8  0.2417  0.1721  0.0000  1.0
  Na  Na1  4  0.0000  0.0000  0.2500  1.0
  Sb  Sb2  8  0.2350  0.3959  0.0000  1.0
  Pb  Pb3  4  0.0000  0.5000  0.2500  1.0
]