data_TcHg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.95
_cell_length_b   4.95
_cell_length_c   2.81
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TcHg2
_chemical_formula_sum   'Tc1 Hg2'
_cell_volume   68.71
_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
  Tc  Tc2  1  0.0  0.0  0.0  1.0
  Hg  Hg0  1  0.0  0.47  0.4  1.0
  Hg  Hg1  1  0.47  0.0  0.4  1.0

data_TcHg2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   7.0
_cell_length_b   7.0
_cell_length_c   2.81
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   TcHg2
_chemical_formula_sum   'Tc2 Hg4'
_cell_volume   137.41
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  0.0  0.0  0.0  1.0
  Hg  Hg1  4  0.24  0.24  0.4  1.0

Tc Hg Hg
TcHg2 crystallizes in the monoclinic Cm space group. Tc(1) is bonded in a 10-coordinate geometry to two equivalent Tc(1) and eight equivalent Hg(1) atoms. Both Tc(1)-Tc(1) bond lengths are 2.81 Å. There are a spread of Tc(1)-Hg(1) bond distances ranging from 2.60-3.10 Å. Hg(1) is bonded in a 6-coordinate geometry to four equivalent Tc(1) and two equivalent Hg(1) atoms. Both Hg(1)-Hg(1) bond lengths are 2.81 Å.