data_[Na2Sr2Sb2Se6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sr  0.9500  2.0000  1.3200
  Sb  2.0500  1.4500  0.8300
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [7.9933]
_cell_length_b [4.3014]
_cell_length_c [10.6426]
_cell_angle_alpha [90.0000]
_cell_angle_beta [110.3730]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [NaSrSbSe3]
_chemical_formula_sum '[Na2 Sr2 Sb2 Se6]'
_cell_volume [343.0296]
_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  0.1246  0.7500  0.6185  1
  Sr  Sr1  2  0.3163  0.7500  0.3171  1
  Sb  Sb2  2  0.2790  0.2500  0.8853  1
  Se  Se3  2  0.0540  0.7500  0.8811  1
  Se  Se4  2  0.2744  0.2500  0.5139  1
  Se  Se5  2  0.4511  0.2500  0.1445  1
]