data_[Na16Ce4As16O56]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ce  1.1200  1.8500  1.0800
  As  2.1800  1.1500  0.6600
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P4/ncc]
_cell_length_a [11.0011]
_cell_length_b [11.0011]
_cell_length_c [10.4141]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [130]
_chemical_formula_structural [Na4Ce(As2O7)2]
_chemical_formula_sum '[Na16 Ce4 As16 O56]'
_cell_volume [1260.3523]
_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  16  0.0749  0.1489  0.8956  1
  Ce  Ce1  4  0.0000  0.5000  0.4307  1
  As  As2  16  0.1006  0.2736  0.1773  1
  O  O3  16  0.0115  0.3215  0.3025  1
  O  O4  16  0.0527  0.1383  0.1189  1
  O  O5  16  0.1256  0.3669  0.5570  1
  O  O6  8  0.2498  0.7502  0.2500  1
]