data_TcSeCl2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.2
_cell_length_b   5.2
_cell_length_c   5.2
_cell_angle_alpha   129.78
_cell_angle_beta   129.78
_cell_angle_gamma   73.76
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TcSeCl2
_chemical_formula_sum   'Tc1 Se1 Cl2'
_cell_volume   80.94
_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  Tc3  1  0.0  0.0  0.16  1.0
  Se  Se2  1  0.0  0.0  0.0  1.0
  Cl  Cl0  1  0.0  0.21  0.08  1.0
  Cl  Cl1  1  0.21  0.0  0.08  1.0

data_TcSeCl2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.24
_cell_length_b   6.24
_cell_length_c   5.2
_cell_angle_alpha   90.0
_cell_angle_beta   126.88
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   TcSeCl2
_chemical_formula_sum   'Tc2 Se2 Cl4'
_cell_volume   161.88
_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  2  0.0  0.0  0.16  1.0
  Se  Se1  2  0.0  0.0  0.0  1.0
  Cl  Cl2  4  0.4  0.4  0.87  1.0

Tc Se Cl Cl
Tc Se Cl Cl 0 1 o o o 1 2 o o o 1 3 o o o 
TcSeCl2 is Ammonia-derived structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two TcSeCl2 clusters. Tc(1) is bonded in a single-bond geometry to one Se(1) atom. The Tc(1)-Se(1) bond length is 0.82 Å. Se(1) is bonded in a trigonal non-coplanar geometry to one Tc(1) and two equivalent Cl(1) atoms. Both Se(1)-Cl(1) bond lengths are 0.87 Å. Cl(1) is bonded in a single-bond geometry to one Se(1) atom.