data_FeTcBr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.72
_cell_length_b   5.72
_cell_length_c   5.72
_cell_angle_alpha   150.38
_cell_angle_beta   150.38
_cell_angle_gamma   42.39
_symmetry_Int_Tables_number   1
_chemical_formula_structural   FeTcBr
_chemical_formula_sum   'Fe1 Tc1 Br1'
_cell_volume   45.64
_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
  Fe  Fe1  1  0.0  0.0  0.37  1.0
  Tc  Tc2  1  0.0  0.0  0.3  1.0
  Br  Br0  1  0.0  0.0  0.67  1.0

data_FeTcBr
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.14
_cell_length_b   4.14
_cell_length_c   5.72
_cell_angle_alpha   90.0
_cell_angle_beta   111.19
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   FeTcBr
_chemical_formula_sum   'Fe2 Tc2 Br2'
_cell_volume   91.28
_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
  Fe  Fe0  2  0.37  0.0  0.37  1.0
  Tc  Tc1  2  0.3  0.0  0.3  1.0
  Br  Br2  2  0.17  0.5  0.67  1.0

Fe Tc Br
TcFeBr is Cyanogen Chloride-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two TcFeBr clusters. Tc(1) is bonded in a single-bond geometry to one Fe(1) atom. The Tc(1)-Fe(1) bond length is 0.37 Å. Fe(1) is bonded in a linear geometry to one Tc(1) and one Br(1) atom. The Fe(1)-Br(1) bond length is 1.71 Å. Br(1) is bonded in a single-bond geometry to one Fe(1) atom.