data_[Ac4Nb4Ag4O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ac  1.1000  1.9500  1.2600
  Nb  1.6000  1.4500  0.8200
  Ag  1.9300  1.6000  1.0867
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [6.8399]
_cell_length_b [11.1662]
_cell_length_c [8.8147]
_cell_angle_alpha [90.0000]
_cell_angle_beta [112.3772]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [AcNbAgO5]
_chemical_formula_sum '[Ac4 Nb4 Ag4 O20]'
_cell_volume [622.5322]
_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
[
  Ac  Ac0  4  0.2500  0.2500  0.5000  1
  Nb  Nb1  4  0.0000  0.4587  0.7500  1
  Ag  Ag2  4  0.0000  0.0389  0.7500  1
  O  O3  8  0.0092  0.3625  0.9222  1
  O  O4  8  0.2432  0.4365  0.3249  1
  O  O5  4  0.0000  0.1544  0.2500  1
]