data_[Cs4Ac4Nb4O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Cs  0.7900  2.6000  1.8100
  Ac  1.1000  1.9500  1.2600
  Nb  1.6000  1.4500  0.8200
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [8.1702]
_cell_length_b [10.9987]
_cell_length_c [8.7839]
_cell_angle_alpha [90.0000]
_cell_angle_beta [113.6846]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [CsAcNbO5]
_chemical_formula_sum '[Cs4 Ac4 Nb4 O20]'
_cell_volume [722.8512]
_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
[
  Cs  Cs0  4  0.0000  0.3312  0.2500  1
  Ac  Ac1  4  0.0000  0.0000  0.0000  1
  Nb  Nb2  4  0.0000  0.3122  0.7500  1
  O  O3  8  0.0825  0.2122  0.6200  1
  O  O4  8  0.1836  0.4149  0.8865  1
  O  O5  4  0.0000  0.0531  0.2500  1
]