data_[Cs2Nb2As4O16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Cs  0.7900  2.6000  1.8100
  Nb  1.6000  1.4500  0.8200
  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 [9.0184]
_cell_length_b [5.5589]
_cell_length_c [9.1575]
_cell_angle_alpha [90.0000]
_cell_angle_beta [93.7757]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [CsNb(AsO4)2]
_chemical_formula_sum '[Cs2 Nb2 As4 O16]'
_cell_volume [458.0897]
_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
[
  Cs  Cs0  2  0.0000  0.0000  0.0000  1.0
  Nb  Nb1  2  0.0000  0.0000  0.5000  1.0
  As  As2  4  0.1385  0.5000  0.3068  1.0
  O  O3  8  0.0309  0.2523  0.3474  1.0
  O  O4  4  0.1834  0.5000  0.1342  1.0
  O  O5  4  0.2138  0.0000  0.5607  1.0
]