data_[Na8Co4P8O28]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Co  1.8800  1.3500  0.7683
  P  2.1900  1.0000  0.5500
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Pnma]
_cell_length_a [13.9646]
_cell_length_b [5.3250]
_cell_length_c [8.8120]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [Na2CoP2O7]
_chemical_formula_sum '[Na8 Co4 P8 O28]'
_cell_volume [655.2744]
_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  4  0.1026  0.7500  0.6336  1
  Na  Na1  4  0.2030  0.2500  0.8651  1
  Co  Co2  4  0.1702  0.2500  0.2689  1
  P  P3  4  0.0399  0.7500  0.2747  1
  P  P4  4  0.1912  0.7500  0.0546  1
  O  O5  8  0.0824  0.5143  0.3512  1
  O  O6  8  0.2346  0.5089  0.1219  1
  O  O7  4  0.0675  0.2500  0.7351  1
  O  O8  4  0.0782  0.7500  0.0963  1
  O  O9  4  0.1963  0.7500  0.8808  1
]