data_[Na2P2O4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  P  2.1900  1.0000  0.5500
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Cm]
_cell_length_a [9.5963]
_cell_length_b [2.8360]
_cell_length_c [3.8386]
_cell_angle_alpha [90.0000]
_cell_angle_beta [93.0849]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [8]
_chemical_formula_structural [NaPO2]
_chemical_formula_sum '[Na2 P2 O4]'
_cell_volume [104.3158]
_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  2  0.2303  0.5000  0.8086  1
  P  P1  2  0.4707  0.0000  0.3135  1
  O  O2  2  0.3103  0.0000  0.3394  1
  O  O3  2  0.4914  0.5000  0.0384  1
]