data_[Dy2Er2Si4]
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
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [Pmc2_1]
_cell_length_a [3.8166]
_cell_length_b [5.6722]
_cell_length_c [7.8615]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [26]
_chemical_formula_structural [DyErSi2]
_chemical_formula_sum '[Dy2 Er2 Si4]'
_cell_volume [170.1908]
_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
[
  Dy  Dy0  2  0.0000  0.3649  0.1791  1
  Er  Er1  2  0.5000  0.1349  0.8209  1
  Si  Si2  2  0.0000  0.1208  0.5382  1
  Si  Si3  2  0.5000  0.3791  0.4619  1
]