data_[Na4Pu4Be4O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Pu  1.2800  1.7500  0.9675
  Be  1.5700  1.0500  0.5900
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [6.8662]
_cell_length_b [8.7191]
_cell_length_c [7.6802]
_cell_angle_alpha [90.0000]
_cell_angle_beta [115.6290]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [NaPuBeO5]
_chemical_formula_sum '[Na4 Pu4 Be4 O20]'
_cell_volume [414.5561]
_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  0.0935  0.7500  1
  Pu  Pu1  4  0.2500  0.2500  0.5000  1
  Be  Be2  4  0.0000  0.4394  0.7500  1
  O  O3  8  0.0480  0.3194  0.6043  1
  O  O4  8  0.2164  0.4524  0.3732  1
  O  O5  4  0.0000  0.1626  0.2500  1
]