data_[Na4Sm4Eu4Se12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sm  1.1700  1.8500  1.2290
  Eu  1.2000  1.8500  1.1985
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [17.9556]
_cell_length_b [4.1471]
_cell_length_c [9.0018]
_cell_angle_alpha [90.0000]
_cell_angle_beta [105.0721]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [NaSmEuSe3]
_chemical_formula_sum '[Na4 Sm4 Eu4 Se12]'
_cell_volume [647.2522]
_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  0.0049  0.5000  0.7051  1
  Sm  Sm1  4  0.1673  0.0000  0.5929  1
  Eu  Eu2  4  0.1337  0.0000  0.0675  1
  Se  Se3  4  0.1662  0.5000  0.3543  1
  Se  Se4  4  0.1803  0.5000  0.8276  1
  Se  Se5  2  0.0000  0.0000  0.5000  1
  Se  Se6  2  0.0000  0.5000  0.0000  1
]