data_[Ce2Er1Se3]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ce  1.1200  1.8500  1.0800
  Er  1.2400  1.7500  1.0300
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P-3m1]
_cell_length_a [4.1693]
_cell_length_b [4.1693]
_cell_length_c [10.5164]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [164]
_chemical_formula_structural [Ce2ErSe3]
_chemical_formula_sum '[Ce2 Er1 Se3]'
_cell_volume [158.3140]
_cell_formula_units_Z [1]
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
[
  Ce  Ce0  2  0.3333  0.6667  0.6717  1
  Er  Er1  1  0.0000  0.0000  0.0000  1
  Se  Se2  2  0.3333  0.6667  0.1477  1
  Se  Se3  1  0.0000  0.0000  0.5000  1
]