data_[Er4Ag1Hg3]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Er  1.2400  1.7500  1.0300
  Ag  1.9300  1.6000  1.0867
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [Pmm2]
_cell_length_a [3.7266]
_cell_length_b [4.8031]
_cell_length_c [11.3444]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [25]
_chemical_formula_structural [Er4AgHg3]
_chemical_formula_sum '[Er4 Ag1 Hg3]'
_cell_volume [203.0589]
_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
[
  Er  Er0  1  0.0000  0.0000  0.1437  1.0
  Er  Er1  1  0.0000  0.5000  0.8577  1.0
  Er  Er2  1  0.5000  0.0000  0.6496  1.0
  Er  Er3  1  0.5000  0.5000  0.3489  1.0
  Ag  Ag4  1  0.5000  0.5000  0.0827  1.0
  Hg  Hg5  1  0.0000  0.0000  0.4126  1.0
  Hg  Hg6  1  0.0000  0.5000  0.5872  1.0
  Hg  Hg7  1  0.5000  0.0000  0.9175  1.0
]