data_[Sr2Dy2Al2Se8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Dy  1.2200  1.7500  1.1310
  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 [6.8088]
_cell_length_b [7.0156]
_cell_length_c [8.3526]
_cell_angle_alpha [90.0000]
_cell_angle_beta [106.9419]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [SrDyAlSe4]
_chemical_formula_sum '[Sr2 Dy2 Al2 Se8]'
_cell_volume [381.6716]
_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
[
  Sr  Sr0  2  0.2399  0.2500  0.0578  1
  Dy  Dy1  2  0.2244  0.2500  0.5550  1
  Al  Al2  2  0.2406  0.7500  0.3217  1
  Se  Se3  4  0.0044  0.5059  0.7295  1
  Se  Se4  2  0.4401  0.7500  0.1337  1
  Se  Se5  2  0.4510  0.7500  0.6000  1
]