data_[Na4Si8Sb4O24]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Si  1.9000  1.1000  0.5400
  Sb  2.0500  1.4500  0.8300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [10.5279]
_cell_length_b [9.5118]
_cell_length_c [5.4062]
_cell_angle_alpha [90.0000]
_cell_angle_beta [105.9015]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [NaSi2SbO6]
_chemical_formula_sum '[Na4 Si8 Sb4 O24]'
_cell_volume [520.6589]
_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  0.0946  0.2500  1.0
  Si  Si1  8  0.2282  0.4059  0.2412  1.0
  Sb  Sb2  4  0.0000  0.2881  0.7500  1.0
  O  O3  8  0.1113  0.1274  0.6708  1.0
  O  O4  8  0.1324  0.2720  0.1463  1.0
  O  O5  8  0.1986  0.4788  0.4993  1.0
]