data_[Pr2Gd2Si8Ag4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pr  1.1300  1.8500  1.0600
  Gd  1.2000  1.8000  1.0750
  Si  1.9000  1.1000  0.5400
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [Amm2]
_cell_length_a [4.2131]
_cell_length_b [4.1814]
_cell_length_c [17.6297]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [38]
_chemical_formula_structural [PrGd(Si2Ag)2]
_chemical_formula_sum '[Pr2 Gd2 Si8 Ag4]'
_cell_volume [310.5765]
_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  2  0.5000  0.0000  0.9041  1
  Gd  Gd1  2  0.0000  0.0000  0.0958  1
  Si  Si2  2  0.0000  0.0000  0.3370  1
  Si  Si3  2  0.0000  0.0000  0.4692  1
  Si  Si4  2  0.5000  0.0000  0.5328  1
  Si  Si5  2  0.5000  0.0000  0.6630  1
  Ag  Ag6  2  0.0000  0.0000  0.7504  1
  Ag  Ag7  2  0.5000  0.0000  0.2477  1
]