data_[K2Ac2Ag2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Ac  1.1000  1.9500  1.2600
  Ag  1.9300  1.6000  1.0867
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.8985]
_cell_length_b [4.3920]
_cell_length_c [9.4489]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.6070]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [KAcAgO4]
_chemical_formula_sum '[K2 Ac2 Ag2 O8]'
_cell_volume [269.6861]
_cell_formula_units_Z [2]
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
[
  K  K0  2  0.3051  0.2500  0.9985  1
  Ac  Ac1  2  0.3131  0.2500  0.5827  1
  Ag  Ag2  2  0.1849  0.7500  0.2458  1
  O  O3  4  0.0532  0.5891  0.6983  1
  O  O4  2  0.3683  0.7500  0.5002  1
  O  O5  2  0.4404  0.7500  0.1657  1
]