data_[Na2Eu6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Eu  1.2000  1.8500  1.1985
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [4.1697]
_cell_length_b [6.3234]
_cell_length_c [12.6311]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [NaEu3]
_chemical_formula_sum '[Na2 Eu6]'
_cell_volume [333.0354]
_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  0.0000  0.5000  0.0000  1
  Eu  Eu1  4  0.0000  0.0000  0.2645  1
  Eu  Eu2  2  0.0000  0.5000  0.5000  1
]