data_[Na8Ca4Ag4O16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ca  1.0000  1.8000  1.1400
  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 [9.3375]
_cell_length_b [9.2785]
_cell_length_c [6.7888]
_cell_angle_alpha [90.0000]
_cell_angle_beta [133.3561]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Na2CaAgO4]
_chemical_formula_sum '[Na8 Ca4 Ag4 O16]'
_cell_volume [427.6580]
_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
[
  Na  Na0  4  0.0000  0.0000  0.0000  1.0
  Na  Na1  4  0.2500  0.2500  0.5000  1.0
  Ca  Ca2  4  0.0000  0.5000  0.0000  1.0
  Ag  Ag3  4  0.2500  0.2500  0.0000  1.0
  O  O4  8  0.0377  0.7498  0.5210  1.0
  O  O5  8  0.2371  0.4744  0.9794  1.0
]