data_[Pm6Ho8Hg8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Ho  1.2300  1.7500  1.0410
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [4.9494]
_cell_length_b [7.8639]
_cell_length_c [16.4802]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [Pm3(HoHg)4]
_chemical_formula_sum '[Pm6 Ho8 Hg8]'
_cell_volume [641.4402]
_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
[
  Pm  Pm0  4  0.0000  0.0000  0.1098  1
  Pm  Pm1  2  0.0000  0.5000  0.0000  1
  Ho  Ho2  8  0.0000  0.2139  0.6741  1
  Hg  Hg3  4  0.0000  0.3047  0.5000  1
  Hg  Hg4  4  0.0000  0.5000  0.2093  1
]