The compound described by Tc4Si crystallizes in the orthorhombic Fmmm space group. There are two inequivalent Tc sites. In the first Tc site, Tc(1) is bonded in a 8-coordinate geometry to two equivalent Tc(2), four equivalent Tc(1), and two equivalent Si(1) atoms. In the second Tc site, Tc(2) is bonded in a 8-coordinate geometry to two equivalent Tc(1) and six equivalent Tc(2) atoms. Si(1) is bonded in a distorted body-centered cubic geometry to four equivalent Tc(1) and four equivalent Si(1) atoms. is represented by the CIF card [CIF]
data_SiTc4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.854
_cell_length_b   10.710
_cell_length_c   2.730
_cell_angle_alpha   85.741
_cell_angle_beta   79.733
_cell_angle_gamma   14.526
_symmetry_Int_Tables_number   1
_cell_volume   71.849
_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  0.000  0.000  0.000  1.0
  Tc  Tc1  1  0.407  0.407  0.593  1.0
  Tc  Tc2  1  0.803  0.803  0.197  1.0
  Tc  Tc3  1  0.197  0.197  0.803  1.0
  Tc  Tc4  1  0.593  0.593  0.407  1.0
[/CIF]
.
The compound described by Tc4Si crystallizes in the orthorhombic Fmmm space group. There are two inequivalent Tc sites. In the first Tc site, Tc(1) is bonded in a 8-coordinate geometry to two equivalent Tc(2), four equivalent Tc(1), and two equivalent Si(1) atoms. In the second Tc site, Tc(2) is bonded in a 8-coordinate geometry to two equivalent Tc(1) and six equivalent Tc(2) atoms. Si(1) is bonded in a distorted body-centered cubic geometry to four equivalent Tc(1) and four equivalent Si(1) atoms. is represented by the CIF card [CIF]
data_SiTc4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.854
_cell_length_b   10.710
_cell_length_c   2.730
_cell_angle_alpha   85.741
_cell_angle_beta   79.733
_cell_angle_gamma   14.526
_symmetry_Int_Tables_number   1
_cell_volume   71.849
_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  0.000  0.000  0.000  1.0
  Tc  Tc1  1  0.407  0.407  0.593  1.0
  Tc  Tc2  1  0.803  0.803  0.197  1.0
  Tc  Tc3  1  0.197  0.197  0.803  1.0
  Tc  Tc4  1  0.593  0.593  0.407  1.0
[/CIF]
.