data_GaTcSe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.04
_cell_length_b   6.04
_cell_length_c   6.04
_cell_angle_alpha   150.58
_cell_angle_beta   150.58
_cell_angle_gamma   42.1
_symmetry_Int_Tables_number   1
_chemical_formula_structural   GaTcSe
_chemical_formula_sum   'Ga1 Tc1 Se1'
_cell_volume   52.94
_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
  Ga  Ga0  1  0.0  0.0  0.97  1.0
  Tc  Tc2  1  0.0  0.0  0.65  1.0
  Se  Se1  1  0.0  0.0  0.92  1.0

data_GaTcSe
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.34
_cell_length_b   4.34
_cell_length_c   6.04
_cell_angle_alpha   90.0
_cell_angle_beta   111.05
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   GaTcSe
_chemical_formula_sum   'Ga2 Tc2 Se2'
_cell_volume   105.88
_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
  Ga  Ga0  2  0.47  0.5  0.97  1.0
  Tc  Tc1  2  0.15  0.5  0.65  1.0
  Se  Se2  2  0.42  0.5  0.92  1.0

Ga Tc Se
TcGaSe crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two TcGaSe clusters. Tc(1) is bonded in a single-bond geometry to one Se(1) atom. The Tc(1)-Se(1) bond length is 1.60 Å. Ga(1) is bonded in a single-bond geometry to one Se(1) atom. The Ga(1)-Se(1) bond length is 0.31 Å. Se(1) is bonded in a distorted single-bond geometry to one Tc(1) and one Ga(1) atom.