data_[Pm3Mg1Hg12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Mg  1.3100  1.5000  0.8600
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [P4/mmm]
_cell_length_a [4.6996]
_cell_length_b [4.6996]
_cell_length_c [18.0624]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [123]
_chemical_formula_structural [Pm3MgHg12]
_chemical_formula_sum '[Pm3 Mg1 Hg12]'
_cell_volume [398.9390]
_cell_formula_units_Z [1]
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  0.2364  1
  Pm  Pm1  1  0.0000  0.0000  0.5000  1
  Mg  Mg2  1  0.0000  0.0000  0.0000  1
  Hg  Hg3  4  0.0000  0.5000  0.1156  1
  Hg  Hg4  4  0.0000  0.5000  0.3711  1
  Hg  Hg5  2  0.5000  0.5000  0.2450  1
  Hg  Hg6  1  0.5000  0.5000  0.0000  1
  Hg  Hg7  1  0.5000  0.5000  0.5000  1
]