data_[Er8Hg4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Er  1.2400  1.7500  1.0300
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [Pnma]
_cell_length_a [6.9688]
_cell_length_b [5.0704]
_cell_length_c [9.1740]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [Er2Hg]
_chemical_formula_sum '[Er8 Hg4]'
_cell_volume [324.1577]
_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
[
  Er  Er0  4  0.0158  0.2500  0.1958  1.0
  Er  Er1  4  0.1707  0.2500  0.5753  1.0
  Hg  Hg2  4  0.2363  0.2500  0.8997  1.0
]