data_[Na4Be4F14]
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
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [6.9728]
_cell_length_b [8.7605]
_cell_length_c [4.7940]
_cell_angle_alpha [90.0000]
_cell_angle_beta [100.0209]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2Be2F7]
_chemical_formula_sum '[Na4 Be4 F14]'
_cell_volume [288.3756]
_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  0.0000  0.3045  0.5000  1.0
  Be  Be1  4  0.2129  0.0000  0.9237  1.0
  F  F2  8  0.2356  0.1436  0.7407  1.0
  F  F3  4  0.1428  0.5000  0.7943  1.0
  F  F4  2  0.0000  0.0000  0.0000  1.0
]