data_[Na8Pm6Be2O16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Pm  1.1300  1.8500  1.1100
  Be  1.5700  1.0500  0.5900
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [12.4333]
_cell_length_b [6.6113]
_cell_length_c [6.6760]
_cell_angle_alpha [90.0000]
_cell_angle_beta [121.4822]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na4Pm3BeO8]
_chemical_formula_sum '[Na8 Pm6 Be2 O16]'
_cell_volume [467.9957]
_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  0.2500  0.2500  0.0000  1
  Na  Na1  2  0.0000  0.0000  0.0000  1
  Na  Na2  2  0.0000  0.5000  0.0000  1
  Pm  Pm3  4  0.2500  0.2500  0.5000  1
  Pm  Pm4  2  0.0000  0.5000  0.5000  1
  Be  Be5  2  0.0000  0.0000  0.5000  1
  O  O6  8  0.0239  0.1958  0.3344  1
  O  O7  4  0.2087  0.5000  0.2263  1
  O  O8  4  0.2229  0.5000  0.7172  1
]