data_[Na8B16O28]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  B  2.0400  0.8500  0.4100
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P-1]
_cell_length_a [6.4618]
_cell_length_b [8.4836]
_cell_length_c [10.3578]
_cell_angle_alpha [93.5531]
_cell_angle_beta [95.0424]
_cell_angle_gamma [90.4216]
_symmetry_Int_Tables_number [2]
_chemical_formula_structural [Na2B4O7]
_chemical_formula_sum '[Na8 B16 O28]'
_cell_volume [564.4746]
_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  2  0.1095  0.1215  0.6182  1
  Na  Na1  2  0.1804  0.3396  0.0169  1
  Na  Na2  2  0.4479  0.9251  0.8536  1
  Na  Na3  2  0.4645  0.4663  0.2362  1
  B  B4  2  0.0551  0.5440  0.7136  1
  B  B5  2  0.0659  0.1809  0.2698  1
  B  B6  2  0.1089  0.6913  0.1941  1
  B  B7  2  0.1467  0.9496  0.1225  1
  B  B8  2  0.2556  0.7555  0.6289  1
  B  B9  2  0.3217  0.7195  0.0172  1
  B  B10  2  0.3456  0.7690  0.4035  1
  B  B11  2  0.3844  0.1750  0.4254  1
  O  O12  2  0.0158  0.8486  0.1744  1
  O  O13  2  0.0552  0.3935  0.7544  1
  O  O14  2  0.1010  0.3532  0.2577  1
  O  O15  2  0.1463  0.1082  0.1493  1
  O  O16  2  0.1486  0.8593  0.7168  1
  O  O17  2  0.1759  0.6221  0.0690  1
  O  O18  2  0.1859  0.1274  0.3894  1
  O  O19  2  0.1984  0.7812  0.4894  1
  O  O20  2  0.2209  0.5874  0.6499  1
  O  O21  2  0.2983  0.8890  0.0460  1
  O  O22  2  0.3077  0.7109  0.2784  1
  O  O23  2  0.4469  0.1862  0.5586  1
  O  O24  2  0.4707  0.6747  0.9459  1
  O  O25  2  0.4816  0.7867  0.6617  1
]