data_[Na4Yb2Se6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Yb  1.1000  1.7500  1.0840
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P-1]
_cell_length_a [4.2900]
_cell_length_b [8.6894]
_cell_length_c [8.7048]
_cell_angle_alpha [87.8625]
_cell_angle_beta [86.3568]
_cell_angle_gamma [85.1401]
_symmetry_Int_Tables_number [2]
_chemical_formula_structural [Na2YbSe3]
_chemical_formula_sum '[Na4 Yb2 Se6]'
_cell_volume [322.5016]
_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  0.3460  0.1724  0.3070  1.0
  Na  Na1  1  0.0000  0.0000  0.0000  1.0
  Na  Na2  1  0.0000  0.5000  0.0000  1.0
  Yb  Yb3  2  0.2499  0.6238  0.3506  1.0
  Se  Se4  2  0.1971  0.6070  0.6812  1.0
  Se  Se5  2  0.3040  0.1347  0.7072  1.0
  Se  Se6  2  0.4832  0.2378  0.9419  1.0
]