data_[K2Nb4Ag4O14]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  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 [Imm2]
_cell_length_a [3.9270]
_cell_length_b [19.4869]
_cell_length_c [4.5373]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [44]
_chemical_formula_structural [KNb2Ag2O7]
_chemical_formula_sum '[K2 Nb4 Ag4 O14]'
_cell_volume [347.2174]
_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  0.0000  0.0000  0.0449  1.0
  Nb  Nb1  4  0.0000  0.3979  0.0550  1.0
  Ag  Ag2  4  0.0000  0.2791  0.4975  1.0
  O  O3  4  0.0000  0.1014  0.4806  1.0
  O  O4  4  0.0000  0.2938  0.9876  1.0
  O  O5  4  0.0000  0.3996  0.4628  1.0
  O  O6  2  0.0000  0.5000  0.9876  1.0
]