data_[Sr2Ce2Ag2Se8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Ce  1.1200  1.8500  1.0800
  Ag  1.9300  1.6000  1.0867
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [7.6744]
_cell_length_b [5.7114]
_cell_length_c [9.2675]
_cell_angle_alpha [90.0000]
_cell_angle_beta [111.5908]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [SrCeAgSe4]
_chemical_formula_sum '[Sr2 Ce2 Ag2 Se8]'
_cell_volume [377.7109]
_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  0.2826  0.7500  0.0497  1.0
  Ce  Ce1  2  0.2787  0.7500  0.5602  1.0
  Ag  Ag2  2  0.2441  0.2500  0.2917  1.0
  Se  Se3  4  0.0464  0.0156  0.7237  1.0
  Se  Se4  2  0.4413  0.2500  0.5967  1.0
  Se  Se5  2  0.4418  0.2500  0.1213  1.0
]