data_[Pr4Nd8Hg8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pr  1.1300  1.8500  1.0600
  Nd  1.1400  1.8500  1.2765
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [3.8637]
_cell_length_b [28.1204]
_cell_length_c [5.5158]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [Pr(NdHg)2]
_chemical_formula_sum '[Pr4 Nd8 Hg8]'
_cell_volume [599.2787]
_cell_formula_units_Z [4]
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  0.0000  0.1463  0.7500  1
  Nd  Nd1  4  0.0000  0.0457  0.2500  1
  Nd  Nd2  4  0.0000  0.2344  0.2500  1
  Hg  Hg3  4  0.0000  0.3579  0.7500  1
  Hg  Hg4  4  0.0000  0.4507  0.2500  1
]