data_[Si1Hg1Ir1O2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Si  1.9000  1.1000  0.5400
  Hg  2.0000  1.5000  1.2450
  Ir  2.2000  1.3500  0.7650
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P4/mmm]
_cell_length_a [3.7464]
_cell_length_b [3.7464]
_cell_length_c [6.9412]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [123]
_chemical_formula_structural [SiHgIrO2]
_chemical_formula_sum '[Si1 Hg1 Ir1 O2]'
_cell_volume [97.4241]
_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
[
  Si  Si0  1  0.5000  0.5000  0.5000  1
  Hg  Hg1  1  0.0000  0.0000  0.5000  1
  Ir  Ir2  1  0.0000  0.0000  0.0000  1
  O  O3  2  0.0000  0.5000  0.0000  1
]