data_[Rb4Ac4Se4O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Ac  1.1000  1.9500  1.2600
  Se  2.5500  1.1500  1.0133
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [8.1142]
_cell_length_b [10.6756]
_cell_length_c [8.5466]
_cell_angle_alpha [90.0000]
_cell_angle_beta [115.0674]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [RbAcSeO5]
_chemical_formula_sum '[Rb4 Ac4 Se4 O20]'
_cell_volume [670.6111]
_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  0.3294  0.2500  1
  Ac  Ac1  4  0.0000  0.0000  0.0000  1
  Se  Se2  4  0.0000  0.3193  0.7500  1
  O  O3  8  0.0869  0.2284  0.6426  1
  O  O4  8  0.1603  0.4122  0.8922  1
  O  O5  4  0.0000  0.0792  0.2500  1
]