data_[K4Na12Ag2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Na  0.9300  1.8000  1.1600
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [Amm2]
_cell_length_a [4.5521]
_cell_length_b [20.7613]
_cell_length_c [8.2997]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [38]
_chemical_formula_structural [K2Na6Ag]
_chemical_formula_sum '[K4 Na12 Ag2]'
_cell_volume [784.3768]
_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  4  0.0000  0.2083  0.5257  1.0
  Na  Na1  4  0.0000  0.0865  0.8704  1.0
  Na  Na2  4  0.5000  0.1306  0.1761  1.0
  Na  Na3  2  0.0000  0.0000  0.2591  1.0
  Na  Na4  2  0.5000  0.0000  0.6022  1.0
  Ag  Ag5  2  0.5000  0.0000  0.9944  1.0
]