data_[Na4V2P4O16]
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
  P  2.1900  1.0000  0.5500
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P4bm]
_cell_length_a [8.3498]
_cell_length_b [8.3498]
_cell_length_c [5.0094]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [100]
_chemical_formula_structural [Na2V(PO4)2]
_chemical_formula_sum '[Na4 V2 P4 O16]'
_cell_volume [349.2495]
_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  0.1755  0.6755  0.5108  1
  V  V1  2  0.0000  0.0000  0.9585  1
  P  P2  4  0.1293  0.3707  0.9744  1
  O  O3  8  0.0771  0.2138  0.8376  1
  O  O4  4  0.1292  0.3708  0.2741  1
  O  O5  2  0.0000  0.0000  0.2845  1
  O  O6  2  0.0000  0.5000  0.8552  1
]