data_[Na4Ag12Sb8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ag  1.9300  1.6000  1.0867
  Sb  2.0500  1.4500  0.8300
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [17.6267]
_cell_length_b [4.5257]
_cell_length_c [8.0467]
_cell_angle_alpha [90.0000]
_cell_angle_beta [111.3527]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [NaAg3Sb2]
_chemical_formula_sum '[Na4 Ag12 Sb8]'
_cell_volume [597.8557]
_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  0.1485  0.0000  0.0779  1.0
  Ag  Ag1  4  0.0568  0.0000  0.4045  1.0
  Ag  Ag2  4  0.0917  0.5000  0.6770  1.0
  Ag  Ag3  4  0.1939  0.5000  0.4663  1.0
  Sb  Sb4  4  0.0317  0.5000  0.1896  1.0
  Sb  Sb5  4  0.1971  0.0000  0.7198  1.0
]