data_[Cs2Y2Al2Se8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Cs  0.7900  2.6000  1.8100
  Y  1.2200  1.8000  1.0400
  Al  1.6100  1.2500  0.6750
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [7.1937]
_cell_length_b [6.0545]
_cell_length_c [10.2338]
_cell_angle_alpha [90.0000]
_cell_angle_beta [105.2210]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [CsYAlSe4]
_chemical_formula_sum '[Cs2 Y2 Al2 Se8]'
_cell_volume [430.0853]
_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
[
  Cs  Cs0  2  0.2459  0.7500  0.0441  1.0
  Y  Y1  2  0.2529  0.7500  0.5529  1.0
  Al  Al2  2  0.2615  0.2500  0.3405  1.0
  Se  Se3  4  0.0057  0.0117  0.6946  1.0
  Se  Se4  2  0.4234  0.2500  0.5737  1.0
  Se  Se5  2  0.4582  0.2500  0.1918  1.0
]