data_Tc3C2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.54
_cell_length_b   7.54
_cell_length_c   7.54
_cell_angle_alpha   22.78
_cell_angle_beta   22.78
_cell_angle_gamma   22.78
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Tc3C2
_chemical_formula_sum   'Tc3 C2'
_cell_volume   56.41
_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  0.0  1.0
  Tc  Tc3  1  0.0  0.0  0.84  1.0
  Tc  Tc4  1  0.0  0.0  0.19  1.0
  C  C0  1  0.0  0.0  0.33  1.0
  C  C1  1  0.0  0.0  0.7  1.0

data_Tc3C2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.16
_cell_length_b   2.98
_cell_length_c   7.54
_cell_angle_alpha   90.0
_cell_angle_beta   103.18
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Tc3C2
_chemical_formula_sum   'Tc6 C4'
_cell_volume   112.81
_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  0.0  1.0
  Tc  Tc1  2  0.0  0.0  0.16  1.0
  Tc  Tc2  2  0.0  0.0  0.81  1.0
  C  C3  2  0.0  0.0  0.3  1.0
  C  C4  2  0.0  0.0  0.67  1.0

Tc Tc Tc C C