data_[Dy1Er1Ag2Se4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Dy  1.2200  1.7500  1.1310
  Er  1.2400  1.7500  1.0300
  Ag  1.9300  1.6000  1.0867
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2/m]
_cell_length_a [6.9171]
_cell_length_b [4.1647]
_cell_length_c [7.2079]
_cell_angle_alpha [90.0000]
_cell_angle_beta [110.0552]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [10]
_chemical_formula_structural [DyEr(AgSe2)2]
_chemical_formula_sum '[Dy1 Er1 Ag2 Se4]'
_cell_volume [195.0517]
_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
[
  Dy  Dy0  1  0.0000  0.0000  0.0000  1.0
  Er  Er1  1  0.0000  0.5000  0.5000  1.0
  Ag  Ag2  1  0.5000  0.0000  0.5000  1.0
  Ag  Ag3  1  0.5000  0.5000  0.0000  1.0
  Se  Se4  2  0.2437  0.0000  0.7451  1.0
  Se  Se5  2  0.2444  0.5000  0.2489  1.0
]