data_[Na4Sb4As4O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sb  2.0500  1.4500  0.8300
  As  2.1800  1.1500  0.6600
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [7.1757]
_cell_length_b [9.2076]
_cell_length_c [7.6115]
_cell_angle_alpha [90.0000]
_cell_angle_beta [114.7841]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [NaSbAsO5]
_chemical_formula_sum '[Na4 Sb4 As4 O20]'
_cell_volume [456.5816]
_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  0.3259  0.7500  1.0
  Sb  Sb1  4  0.0000  0.0000  0.0000  1.0
  As  As2  4  0.0000  0.3240  0.2500  1.0
  O  O3  8  0.1041  0.2175  0.1247  1.0
  O  O4  8  0.1788  0.4399  0.4145  1.0
  O  O5  4  0.0000  0.0719  0.7500  1.0
]