data_Tc3Ag
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.92
_cell_length_b   3.92
_cell_length_c   3.82
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Tc3Ag
_chemical_formula_sum   'Tc3 Ag1'
_cell_volume   58.68
_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  Tc1  1  0.0  0.96  0.91  1.0
  Tc  Tc2  1  0.96  0.0  0.91  1.0
  Tc  Tc3  1  0.0  0.0  0.0  1.0
  Ag  Ag0  1  0.96  0.96  0.0  1.0

data_Tc3Ag
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.55
_cell_length_b   5.55
_cell_length_c   3.82
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Tc3Ag
_chemical_formula_sum   'Tc6 Ag2'
_cell_volume   117.35
_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  4  0.48  0.48  0.91  1.0
  Tc  Tc1  2  0.0  0.0  0.0  1.0
  Ag  Ag2  2  0.46  0.5  -0.0  1.0

Tc Tc Tc Ag
Tc Tc Tc Ag 0 1 - + o 2 3 - - o 
Tc3Ag is alpha Po structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Tc3Ag clusters. There are two inequivalent Tc sites. In the first Tc site, Tc(1) is bonded in a 3-coordinate geometry to one Tc(1), one Tc(2), and one Ag(1) atom. The Tc(1)-Tc(1) bond length is 0.22 Å. The Tc(1)-Tc(2) bond length is 0.38 Å. The Tc(1)-Ag(1) bond length is 0.38 Å. In the second Tc site, Tc(2) is bonded in a single-bond geometry to two equivalent Tc(1) and one Ag(1) atom. The Tc(2)-Ag(1) bond length is 0.22 Å. Ag(1) is bonded in a distorted single-bond geometry to one Tc(2) and two equivalent Tc(1) atoms.