data_Re2SiTc
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.11
_cell_length_b   5.11
_cell_length_c   5.11
_cell_angle_alpha   146.52
_cell_angle_beta   129.07
_cell_angle_gamma   62.33
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Re2SiTc
_chemical_formula_sum   'Re2 Si1 Tc1'
_cell_volume   56.48
_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
  Re  Re0  1  0.0  0.2  0.35  1.0
  Re  Re1  1  0.47  0.0  0.02  1.0
  Si  Si2  1  0.0  0.0  0.0  1.0
  Tc  Tc3  1  0.0  0.0  0.37  1.0

data_Re2SiTc
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.94
_cell_length_b   4.39
_cell_length_c   5.11
_cell_angle_alpha   115.47
_cell_angle_beta   106.74
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Re2SiTc
_chemical_formula_sum   'Re2 Si1 Tc1'
_cell_volume   56.48
_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  0.0  0.0  0.0  1.0
  Re  Re1  1  0.0  0.02  0.55  1.0
  Tc  Tc2  1  0.0  0.37  0.37  1.0
  Re  Re3  1  0.8  0.15  0.15  1.0

Re Re Si Tc
Re Re Si Tc 0 2 o o o 0 3 o o o 0 1 - o o 1 3 o o - 1 3 + o o 1 2 o o o 
Re2TcSi crystallizes in the triclinic P1 space group. There are two inequivalent Re sites. In the first Re site, Re(1) is bonded in a distorted bent 120 degrees geometry to one Re(2), one Tc(1), and one Si(1) atom. The Re(1)-Re(2) bond length is 2.27 Å. The Re(1)-Tc(1) bond length is 1.10 Å. The Re(1)-Si(1) bond length is 1.09 Å. In the second Re site, Re(2) is bonded in a 6-coordinate geometry to one Re(1), two equivalent Re(2), two equivalent Tc(1), and one Si(1) atom. Both Re(2)-Re(2) bond lengths are 2.94 Å. There is one shorter (2.10 Å) and one longer (2.60 Å) Re(2)-Tc(1) bond length. The Re(2)-Si(1) bond length is 2.34 Å. Tc(1) is bonded in a distorted single-bond geometry to one Re(1) and two equivalent Re(2) atoms. Si(1) is bonded in a distorted single-bond geometry to one Re(1) and one Re(2) atom.