data_[Pm4Zn12Hg4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Zn  1.6500  1.3500  0.8800
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [P6_3/mmc]
_cell_length_a [6.4625]
_cell_length_b [6.4625]
_cell_length_c [12.3704]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [194]
_chemical_formula_structural [PmZn3Hg]
_chemical_formula_sum '[Pm4 Zn12 Hg4]'
_cell_volume [447.4130]
_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
[
  Pm  Pm0  2  0.0000  0.0000  0.0000  1
  Pm  Pm1  2  0.3333  0.6667  0.2500  1
  Zn  Zn2  6  0.0000  0.5000  0.0000  1
  Zn  Zn3  6  0.1272  0.2544  0.7500  1
  Hg  Hg4  4  0.3333  0.6667  0.6370  1
]