data_[Na4Be4O6]
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
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/c]
_cell_length_a [4.9612]
_cell_length_b [7.1272]
_cell_length_c [5.7911]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.9010]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [Na2Be2O3]
_chemical_formula_sum '[Na4 Be4 O6]'
_cell_volume [193.7280]
_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  4  0.2611  0.6367  0.8897  1.0
  Be  Be1  4  0.2978  0.0176  0.9903  1.0
  O  O2  4  0.4214  0.5591  0.2904  1.0
  O  O3  2  0.0000  0.0000  0.0000  1.0
]