data_[Na4Ga2As2Se8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ga  1.8100  1.3000  0.7600
  As  2.1800  1.1500  0.6600
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Pmn2_1]
_cell_length_a [9.3524]
_cell_length_b [8.0260]
_cell_length_c [6.2241]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [31]
_chemical_formula_structural [Na2GaAsSe4]
_chemical_formula_sum '[Na4 Ga2 As2 Se8]'
_cell_volume [467.1972]
_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  0.2433  0.3337  0.4493  1
  Ga  Ga1  2  0.0000  0.1479  0.9930  1
  As  As2  2  0.0000  0.8180  0.4864  1
  Se  Se3  4  0.2197  0.2987  0.9281  1
  Se  Se4  2  0.0000  0.1071  0.3905  1
  Se  Se5  2  0.0000  0.8544  0.8753  1
]