data_[Pr4Er6Si8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pr  1.1300  1.8500  1.0600
  Er  1.2400  1.7500  1.0300
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [P2_1/c]
_cell_length_a [7.7331]
_cell_length_b [7.7852]
_cell_length_c [7.4763]
_cell_angle_alpha [90.0000]
_cell_angle_beta [107.1436]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [Pr2Er3Si4]
_chemical_formula_sum '[Pr4 Er6 Si8]'
_cell_volume [430.1006]
_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
[
  Pr  Pr0  4  0.1970  0.1761  0.0811  1
  Er  Er1  4  0.2461  0.6797  0.2528  1
  Er  Er2  2  0.5000  0.0000  0.5000  1
  Si  Si3  4  0.0784  0.5325  0.8768  1
  Si  Si4  4  0.4944  0.1188  0.8755  1
]