data_[Na8V4Sb4O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  V  1.6300  1.3500  0.7775
  Sb  2.0500  1.4500  0.8300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Cmc2_1]
_cell_length_a [3.2710]
_cell_length_b [12.4291]
_cell_length_c [11.9471]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [36]
_chemical_formula_structural [Na2VSbO5]
_chemical_formula_sum '[Na8 V4 Sb4 O20]'
_cell_volume [485.7169]
_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  0.0758  0.6746  1
  Na  Na1  4  0.0000  0.1701  0.2685  1
  V  V2  4  0.0000  0.2463  0.0324  1
  Sb  Sb3  4  0.0000  0.4599  0.4443  1
  O  O4  4  0.0000  0.0747  0.0363  1
  O  O5  4  0.0000  0.2590  0.6334  1
  O  O6  4  0.0000  0.3005  0.4166  1
  O  O7  4  0.0000  0.4031  0.0234  1
  O  O8  4  0.0000  0.4882  0.7945  1
]