data_[Na4Sb4As2O12]
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/m]
_cell_length_a [8.9928]
_cell_length_b [6.6592]
_cell_length_c [5.9066]
_cell_angle_alpha [90.0000]
_cell_angle_beta [111.7009]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2Sb2AsO6]
_chemical_formula_sum '[Na4 Sb4 As2 O12]'
_cell_volume [328.6454]
_cell_formula_units_Z [2]
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  0.1603  0.5000  0.1146  1
  Sb  Sb1  4  0.0426  0.0000  0.2849  1
  As  As2  2  0.0000  0.5000  0.5000  1
  O  O3  8  0.0341  0.3107  0.7485  1
  O  O4  4  0.2252  0.5000  0.5383  1
]