data_[Nd36Hg18N3]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Nd  1.1400  1.8500  1.2765
  Hg  2.0000  1.5000  1.2450
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [R-3]
_cell_length_a [12.3810]
_cell_length_b [12.3810]
_cell_length_c [13.1743]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [Nd12Hg6N]
_chemical_formula_sum '[Nd36 Hg18 N3]'
_cell_volume [1748.9324]
_cell_formula_units_Z [3]
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
[
  Nd  Nd0  18  0.0326  0.1786  0.8893  1
  Nd  Nd1  18  0.0347  0.8480  0.3837  1
  Hg  Hg2  18  0.0019  0.6046  0.2492  1
  N  N3  3  0.0000  0.0000  0.0000  1
]