data_[Ce1Nd1Er2Se4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ce  1.1200  1.8500  1.0800
  Nd  1.1400  1.8500  1.2765
  Er  1.2400  1.7500  1.0300
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2/m]
_cell_length_a [7.0392]
_cell_length_b [4.0496]
_cell_length_c [7.2636]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.7353]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [10]
_chemical_formula_structural [CeNd(ErSe2)2]
_chemical_formula_sum '[Ce1 Nd1 Er2 Se4]'
_cell_volume [196.0869]
_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  1  0.5000  0.5000  0.0000  1.0
  Nd  Nd1  1  0.0000  0.0000  0.0000  1.0
  Er  Er2  1  0.0000  0.5000  0.5000  1.0
  Er  Er3  1  0.5000  0.0000  0.5000  1.0
  Se  Se4  2  0.2452  0.0000  0.7336  1.0
  Se  Se5  2  0.2569  0.5000  0.2671  1.0
]