data_[Na8Be4B8O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Be  1.5700  1.0500  0.5900
  B  2.0400  0.8500  0.4100
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [5.9099]
_cell_length_b [8.1665]
_cell_length_c [9.1238]
_cell_angle_alpha [90.0000]
_cell_angle_beta [98.1484]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Na2BeB2O5]
_chemical_formula_sum '[Na8 Be4 B8 O20]'
_cell_volume [435.9007]
_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  8  0.0105  0.3050  0.5715  1.0
  Be  Be1  4  0.0000  0.2893  0.2500  1.0
  B  B2  8  0.1663  0.0059  0.1783  1.0
  O  O3  8  0.1522  0.1709  0.1562  1.0
  O  O4  8  0.1653  0.4103  0.3670  1.0
  O  O5  4  0.0000  0.0757  0.7500  1.0
]