data_[Na4Nd2Hg2Sb4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Nd  1.1400  1.8500  1.2765
  Hg  2.0000  1.5000  1.2450
  Sb  2.0500  1.4500  0.8300
]
_symmetry_space_group_name_H-M [Pmc2_1]
_cell_length_a [4.5582]
_cell_length_b [9.1658]
_cell_length_c [8.3773]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [26]
_chemical_formula_structural [Na2NdHgSb2]
_chemical_formula_sum '[Na4 Nd2 Hg2 Sb4]'
_cell_volume [350.0020]
_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
[
  Na  Na0  2  0.0000  0.1729  0.3762  1.0
  Na  Na1  2  0.5000  0.0757  0.0576  1.0
  Nd  Nd2  2  0.0000  0.4508  0.9724  1.0
  Hg  Hg3  2  0.5000  0.2979  0.6227  1.0
  Sb  Sb4  2  0.0000  0.1528  0.7760  1.0
  Sb  Sb5  2  0.5000  0.3944  0.2409  1.0
]