data_[K4Ce2Ag4Se8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  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 [C2/m]
_cell_length_a [15.5940]
_cell_length_b [4.3190]
_cell_length_c [8.0185]
_cell_angle_alpha [90.0000]
_cell_angle_beta [110.1524]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [K2Ce(AgSe2)2]
_chemical_formula_sum '[K4 Ce2 Ag4 Se8]'
_cell_volume [506.9858]
_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
[
  K  K0  4  0.1360  0.0000  0.5730  1.0
  Ce  Ce1  2  0.0000  0.0000  0.0000  1.0
  Ag  Ag2  4  0.1801  0.5000  0.9851  1.0
  Se  Se3  4  0.0091  0.5000  0.7590  1.0
  Se  Se4  4  0.1952  0.0000  0.1990  1.0
]