data_[Na4Sr4Be4F20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sr  0.9500  2.0000  1.3200
  Be  1.5700  1.0500  0.5900
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [6.9909]
_cell_length_b [9.5163]
_cell_length_c [7.1274]
_cell_angle_alpha [90.0000]
_cell_angle_beta [102.2887]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [NaSrBeF5]
_chemical_formula_sum '[Na4 Sr4 Be4 F20]'
_cell_volume [463.3022]
_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  4  0.0000  0.0000  0.0000  1.0
  Sr  Sr1  4  0.0000  0.3609  0.7500  1.0
  Be  Be2  4  0.0000  0.2930  0.2500  1.0
  F  F3  8  0.1031  0.3949  0.4183  1.0
  F  F4  8  0.1448  0.1955  0.1718  1.0
  F  F5  4  0.0000  0.1199  0.7500  1.0
]