data_CoTc2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.02
_cell_length_b   5.02
_cell_length_c   5.02
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CoTc2
_chemical_formula_sum   'Co2 Tc4'
_cell_volume   89.33
_cell_formula_units_Z   2
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
  Co  Co0  1  0.77  0.77  0.77  1.0
  Co  Co1  1  0.0  0.0  0.0  1.0
  Tc  Tc2  1  0.44  0.66  0.66  1.0
  Tc  Tc3  1  0.66  0.44  0.66  1.0
  Tc  Tc4  1  0.66  0.66  0.44  1.0
  Tc  Tc5  1  0.44  0.44  0.44  1.0

data_CoTc2
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.02
_cell_length_b   5.02
_cell_length_c   12.29
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   CoTc2
_chemical_formula_sum   'Co6 Tc12'
_cell_volume   267.99
_cell_formula_units_Z   6
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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
  Co  Co0  3  0.0  0.0  0.0  1.0
  Co  Co1  3  0.0  0.0  0.23  1.0
  Tc  Tc2  9  0.15  0.08  0.41  1.0
  Tc  Tc3  3  0.0  0.0  0.56  1.0

Co Co Tc Tc Tc Tc
Tc2Co crystallizes in the trigonal R3m space group. There are two inequivalent Tc sites. In the first Tc site, Tc(1) is bonded in a 2-coordinate geometry to one Tc(2), two equivalent Tc(1), one Co(2), and two equivalent Co(1) atoms. The Tc(1)-Tc(2) bond length is 1.96 Å. Both Tc(1)-Tc(1) bond lengths are 1.13 Å. The Tc(1)-Co(2) bond length is 2.45 Å. There is one shorter (2.41 Å) and one longer (2.86 Å) Tc(1)-Co(1) bond length. In the second Tc site, Tc(2) is bonded in a 9-coordinate geometry to three equivalent Tc(1), three equivalent Co(1), and three equivalent Co(2) atoms. All Tc(2)-Co(1) bond lengths are 2.90 Å. All Tc(2)-Co(2) bond lengths are 3.16 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 13-coordinate geometry to three equivalent Tc(2), six equivalent Tc(1), and four equivalent Co(2) atoms. There is one shorter (2.78 Å) and three longer (3.18 Å) Co(1)-Co(2) bond lengths. In the second Co site, Co(2) is bonded in a 3-coordinate geometry to three equivalent Tc(1), three equivalent Tc(2), and four equivalent Co(1) atoms.