data_[Na4Al2Sb2Se8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Al  1.6100  1.2500  0.6750
  Sb  2.0500  1.4500  0.8300
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Pmn2_1]
_cell_length_a [9.6387]
_cell_length_b [8.0096]
_cell_length_c [6.2729]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [31]
_chemical_formula_structural [Na2AlSbSe4]
_chemical_formula_sum '[Na4 Al2 Sb2 Se8]'
_cell_volume [484.2789]
_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  0.2448  0.3318  0.4492  1.0
  Al  Al1  2  0.0000  0.1491  0.9977  1.0
  Sb  Sb2  2  0.0000  0.8073  0.4755  1.0
  Se  Se3  4  0.2089  0.3024  0.9246  1.0
  Se  Se4  2  0.0000  0.1211  0.3865  1.0
  Se  Se5  2  0.0000  0.8550  0.8925  1.0
]