data_[Na2Cr8O10]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Cr  1.6600  1.4000  0.9400
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [3.0216]
_cell_length_b [4.7910]
_cell_length_c [15.3619]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [NaCr4O5]
_chemical_formula_sum '[Na2 Cr8 O10]'
_cell_volume [222.3853]
_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  0.0000  0.0000  0.0000  1
  Cr  Cr1  4  0.0000  0.0000  0.2018  1
  Cr  Cr2  4  0.0000  0.0000  0.4022  1
  O  O3  4  0.0000  0.5000  0.1986  1
  O  O4  4  0.0000  0.5000  0.3837  1
  O  O5  2  0.0000  0.5000  0.0000  1
]