data_TcAsSe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.82
_cell_length_b   6.82
_cell_length_c   6.82
_cell_angle_alpha   154.52
_cell_angle_beta   154.52
_cell_angle_gamma   36.34
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TcAsSe
_chemical_formula_sum   'Tc1 As1 Se1'
_cell_volume   58.58
_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  Tc2  1  0.0  0.0  0.69  1.0
  As  As0  1  0.0  0.0  0.55  1.0
  Se  Se1  1  0.0  0.0  0.71  1.0

data_TcAsSe
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.25
_cell_length_b   4.25
_cell_length_c   6.82
_cell_angle_alpha   90.0
_cell_angle_beta   108.17
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   TcAsSe
_chemical_formula_sum   'Tc2 As2 Se2'
_cell_volume   117.16
_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  0.31  1.0
  As  As1  2  0.0  0.0  0.45  1.0
  Se  Se2  2  0.0  0.0  0.29  1.0

Tc As Se
TcAsSe crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two TcAsSe clusters. Tc(1) is bonded in a distorted linear geometry to one As(1) and one Se(1) atom. The Tc(1)-As(1) bond length is 0.95 Å. The Tc(1)-Se(1) bond length is 0.14 Å. As(1) is bonded in a single-bond geometry to one Tc(1) atom. Se(1) is bonded in a single-bond geometry to one Tc(1) atom.