data_[Na4Sr16Ag4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sr  0.9500  2.0000  1.3200
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [10.4975]
_cell_length_b [14.8737]
_cell_length_c [7.2451]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.4667]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [NaSr4Ag]
_chemical_formula_sum '[Na4 Sr16 Ag4]'
_cell_volume [1072.9733]
_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  0.3801  0.2500  1.0
  Sr  Sr1  8  0.1052  0.1712  0.5532  1.0
  Sr  Sr2  8  0.2207  0.4142  0.8757  1.0
  Ag  Ag3  4  0.0000  0.0008  0.2500  1.0
]