data_[Sm8Eu4Se16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  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 [I-42d]
_cell_length_a [8.9472]
_cell_length_b [8.9472]
_cell_length_c [8.9019]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [122]
_chemical_formula_structural [Sm2EuSe4]
_chemical_formula_sum '[Sm8 Eu4 Se16]'
_cell_volume [712.6085]
_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
[
  Sm  Sm0  8  0.1259  0.7500  0.1250  1.0
  Eu  Eu1  4  0.0000  0.0000  0.5000  1.0
  Se  Se2  16  0.0764  0.6728  0.4447  1.0
]