data_SiTcOs2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.1
_cell_length_b   5.1
_cell_length_c   5.1
_cell_angle_alpha   147.06
_cell_angle_beta   129.47
_cell_angle_gamma   61.64
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiTcOs2
_chemical_formula_sum   'Si1 Tc1 Os2'
_cell_volume   55.23
_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  Si2  1  0.0  0.0  0.39  1.0
  Tc  Tc3  1  0.45  0.0  0.43  1.0
  Os  Os0  1  0.0  0.0  0.0  1.0
  Os  Os1  1  0.0  0.18  0.94  1.0

data_SiTcOs2
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.89
_cell_length_b   4.36
_cell_length_c   5.1
_cell_angle_alpha   115.26
_cell_angle_beta   106.47
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiTcOs2
_chemical_formula_sum   'Si1 Tc1 Os2'
_cell_volume   55.23
_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  0.39  0.39  1.0
  Tc  Tc1  1  0.0  0.43  0.99  1.0
  Os  Os2  1  0.0  0.0  0.0  1.0
  Os  Os3  1  0.82  0.76  0.76  1.0

Si Tc Os Os
TcOs2Si crystallizes in the triclinic P1 space group. Tc(1) is bonded in a distorted bent 150 degrees geometry to one Os(1) and one Os(2) atom. The Tc(1)-Os(1) bond length is 1.91 Å. The Tc(1)-Os(2) bond length is 2.17 Å. There are two inequivalent Os sites. In the first Os site, Os(1) is bonded in a 3-coordinate geometry to one Tc(1), one Os(2), and one Si(1) atom. The Os(1)-Os(2) bond length is 1.20 Å. The Os(1)-Si(1) bond length is 2.00 Å. In the second Os site, Os(2) is bonded in a distorted rectangular see-saw-like geometry to one Tc(1), one Os(1), and two equivalent Si(1) atoms. There is one shorter (2.07 Å) and one longer (2.57 Å) Os(2)-Si(1) bond length. Si(1) is bonded in a 2-coordinate geometry to one Os(1) and two equivalent Os(2) atoms.