data_[K16Na4Ag4]
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 [C2/c]
_cell_length_a [10.9874]
_cell_length_b [16.3879]
_cell_length_c [7.5616]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.7619]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [K4NaAg]
_chemical_formula_sum '[K16 Na4 Ag4]'
_cell_volume [1289.1994]
_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
[
  K  K0  8  0.1063  0.1692  0.5594  1.0
  K  K1  8  0.2238  0.4211  0.8635  1.0
  Na  Na2  4  0.0000  0.3779  0.2500  1.0
  Ag  Ag3  4  0.0000  0.0014  0.2500  1.0
]