data_[Pm8Zn8Hg4]
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 [C2/m]
_cell_length_a [10.8821]
_cell_length_b [4.6438]
_cell_length_c [10.7960]
_cell_angle_alpha [90.0000]
_cell_angle_beta [116.3873]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Pm2Zn2Hg]
_chemical_formula_sum '[Pm8 Zn8 Hg4]'
_cell_volume [488.7242]
_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  4  0.0246  0.5000  0.3339  1
  Pm  Pm1  4  0.1938  0.5000  0.1039  1
  Zn  Zn2  4  0.0221  0.0000  0.8915  1
  Zn  Zn3  4  0.1295  0.0000  0.5640  1
  Hg  Hg4  4  0.2297  0.0000  0.3425  1
]