data_[Ho6Cd18Hg18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ho  1.2300  1.7500  1.0410
  Cd  1.6900  1.5500  1.0900
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [6.4842]
_cell_length_b [6.4842]
_cell_length_c [29.9675]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [Ho(CdHg)3]
_chemical_formula_sum '[Ho6 Cd18 Hg18]'
_cell_volume [1091.1844]
_cell_formula_units_Z [6]
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
[
  Ho  Ho0  6  0.0000  0.0000  0.2987  1.0
  Cd  Cd1  18  0.0176  0.5088  0.8709  1.0
  Hg  Hg2  18  0.0134  0.5067  0.7168  1.0
]