data_[Na4Be2H8]
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
  H  2.2000  0.2500  0.0000
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [5.0292]
_cell_length_b [4.9462]
_cell_length_c [6.7440]
_cell_angle_alpha [90.0000]
_cell_angle_beta [100.7599]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [Na2BeH4]
_chemical_formula_sum '[Na4 Be2 H8]'
_cell_volume [164.8116]
_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  2  0.2503  0.7500  0.4646  1.0
  Na  Na1  2  0.2738  0.7500  0.9707  1.0
  Be  Be2  2  0.2840  0.2500  0.2193  1.0
  H  H3  4  0.4572  0.0194  0.2648  1.0
  H  H4  2  0.0734  0.2500  0.3394  1.0
  H  H5  2  0.1803  0.2500  0.0065  1.0
]