data_Tl2SiTc
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.21
_cell_length_b   3.21
_cell_length_c   8.7
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Tl2SiTc
_chemical_formula_sum   'Tl2 Si1 Tc1'
_cell_volume   89.76
_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
  Tl  Tl2  1  0.0  0.0  0.13  1.0
  Tl  Tl3  1  0.61  0.61  0.64  1.0
  Si  Si0  1  0.0  0.0  0.05  1.0
  Tc  Tc1  1  0.61  0.61  0.93  1.0

data_Tl2SiTc
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.54
_cell_length_b   4.54
_cell_length_c   8.7
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Tl2SiTc
_chemical_formula_sum   'Tl4 Si2 Tc2'
_cell_volume   179.52
_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
  Tl  Tl0  2  0.0  0.0  0.13  1.0
  Tl  Tl1  2  0.11  0.5  0.64  1.0
  Si  Si2  2  0.0  0.0  0.05  1.0
  Tc  Tc3  2  0.11  0.5  0.93  1.0

Tl Tl Si Tc
Tl Tl Si Tc 0 2 o o o 0 3 - - - 1 1 + o o 1 1 o + o 1 3 o o o 2 3 o - - 2 3 - o - 2 3 - - - 
TcTl2Si crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two TcTl2Si clusters. Tc(1) is bonded in a 2-coordinate geometry to one Tl(2) and one Si(1) atom. The Tc(1)-Tl(2) bond length is 2.53 Å. The Tc(1)-Si(1) bond length is 2.04 Å. There are two inequivalent Tl sites. In the first Tl site, Tl(1) is bonded in a single-bond geometry to one Si(1) atom. The Tl(1)-Si(1) bond length is 0.73 Å. In the second Tl site, Tl(2) is bonded in a single-bond geometry to one Tc(1) atom. Si(1) is bonded in a single-bond geometry to one Tc(1) and one Tl(1) atom.