data_[Yb1Er2Se4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Yb  1.1000  1.7500  1.0840
  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 [6.9951]
_cell_length_b [4.0968]
_cell_length_c [7.1805]
_cell_angle_alpha [90.0000]
_cell_angle_beta [107.9970]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [10]
_chemical_formula_structural [Yb(ErSe2)2]
_chemical_formula_sum '[Yb1 Er2 Se4]'
_cell_volume [195.7097]
_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
[
  Yb  Yb0  1  0.5000  0.0000  0.5000  1.0
  Er  Er1  1  0.0000  0.0000  0.0000  1.0
  Er  Er2  1  0.5000  0.5000  0.0000  1.0
  Se  Se3  2  0.2422  0.5000  0.2420  1.0
  Se  Se4  2  0.2582  0.0000  0.7683  1.0
]