data_[Tc2Ni2Hg4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tc  1.9000  1.3500  0.7417
  Ni  1.9100  1.3500  0.7400
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [2.9623]
_cell_length_b [4.9073]
_cell_length_c [9.3921]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [TcNiHg2]
_chemical_formula_sum '[Tc2 Ni2 Hg4]'
_cell_volume [136.5333]
_cell_formula_units_Z [2]
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
[
  Tc  Tc0  2  0.0000  0.5000  0.0000  1
  Ni  Ni1  2  0.0000  0.5000  0.5000  1
  Hg  Hg2  4  0.0000  0.0000  0.2315  1
]