data_[Pm4Ga4Hg4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Ga  1.8100  1.3000  0.7600
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [Imm2]
_cell_length_a [4.6994]
_cell_length_b [7.4882]
_cell_length_c [8.0726]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [44]
_chemical_formula_structural [PmGaHg]
_chemical_formula_sum '[Pm4 Ga4 Hg4]'
_cell_volume [284.0780]
_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  0.6173  1
  Pm  Pm1  2  0.0000  0.5000  0.6724  1
  Ga  Ga2  4  0.0000  0.1980  0.9833  1
  Hg  Hg3  4  0.0000  0.2841  0.3116  1
]