data_[Rb4As4Pb4O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  As  2.1800  1.1500  0.6600
  Pb  2.3300  1.8000  1.1225
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [7.5499]
_cell_length_b [10.0660]
_cell_length_c [7.6756]
_cell_angle_alpha [90.0000]
_cell_angle_beta [115.9960]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [RbAsPbO5]
_chemical_formula_sum '[Rb4 As4 Pb4 O20]'
_cell_volume [524.3145]
_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  4  0.0000  0.3453  0.2500  1.0
  As  As1  4  0.0000  0.3056  0.7500  1.0
  Pb  Pb2  4  0.0000  0.0000  0.0000  1.0
  O  O3  8  0.0972  0.2080  0.6256  1.0
  O  O4  8  0.1814  0.4075  0.9138  1.0
  O  O5  4  0.0000  0.0794  0.2500  1.0
]