data_[Na2Ce2Ag2Se6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  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 [8.3521]
_cell_length_b [4.2598]
_cell_length_c [9.3812]
_cell_angle_alpha [90.0000]
_cell_angle_beta [102.4350]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [NaCeAgSe3]
_chemical_formula_sum '[Na2 Ce2 Ag2 Se6]'
_cell_volume [325.9355]
_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  2  0.1981  0.2500  0.2460  1.0
  Ce  Ce1  2  0.3192  0.7500  0.8331  1.0
  Ag  Ag2  2  0.0879  0.2500  0.5855  1.0
  Se  Se3  2  0.0987  0.2500  0.8694  1.0
  Se  Se4  2  0.2584  0.7500  0.5241  1.0
  Se  Se5  2  0.4377  0.7500  0.1538  1.0
]