data_[Na4Ga12Ag8]
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 [Cmcm]
_cell_length_a [9.7963]
_cell_length_b [8.8973]
_cell_length_c [5.6464]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [NaGa3Ag2]
_chemical_formula_sum '[Na4 Ga12 Ag8]'
_cell_volume [492.1474]
_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  0.3374  0.2500  1
  Ga  Ga1  8  0.1595  0.2724  0.7500  1
  Ga  Ga2  4  0.0000  0.0407  0.7500  1
  Ag  Ag3  8  0.2388  0.0000  0.0000  1
]