data_[Na8Ga16Ag20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ga  1.8100  1.3000  0.7600
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [Fmmm]
_cell_length_a [5.8018]
_cell_length_b [9.4625]
_cell_length_c [16.8977]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [69]
_chemical_formula_structural [Na2Ga4Ag5]
_chemical_formula_sum '[Na8 Ga16 Ag20]'
_cell_volume [927.6827]
_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  8  0.0000  0.0000  0.1310  1.0
  Ga  Ga1  16  0.0000  0.1534  0.3693  1.0
  Ag  Ag2  8  0.2500  0.2500  0.0000  1.0
  Ag  Ag3  8  0.2500  0.2500  0.2500  1.0
  Ag  Ag4  4  0.0000  0.0000  0.5000  1.0
]