data_Tc2PbW
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.02
_cell_length_b   9.02
_cell_length_c   9.02
_cell_angle_alpha   19.62
_cell_angle_beta   19.62
_cell_angle_gamma   19.62
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Tc2PbW
_chemical_formula_sum   'Tc2 Pb1 W1'
_cell_volume   72.36
_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  Tc1  1  0.0  0.0  0.61  1.0
  Tc  Tc2  1  0.0  0.0  0.92  1.0
  Pb  Pb0  1  0.0  0.0  0.27  1.0
  W  W3  1  0.0  0.0  0.0  1.0

data_Tc2PbW
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.32
_cell_length_b   3.07
_cell_length_c   9.02
_cell_angle_alpha   90.0
_cell_angle_beta   101.35
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Tc2PbW
_chemical_formula_sum   'Tc4 Pb2 W2'
_cell_volume   144.72
_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  0.08  1.0
  Tc  Tc1  2  0.0  0.0  0.39  1.0
  Pb  Pb2  2  0.0  0.0  0.73  1.0
  W  W3  2  0.0  0.0  0.0  1.0

Tc Tc Pb W
WTc2Pb crystallizes in the monoclinic Cm space group. W(1) is bonded in a single-bond geometry to one Tc(2) and one Pb(1) atom. The W(1)-Tc(2) bond length is 0.72 Å. The W(1)-Pb(1) bond length is 2.39 Å. There are two inequivalent Tc sites. In the first Tc site, Tc(1) is bonded to one Tc(2), six equivalent Tc(1), and one Pb(1) atom to form a mixture of distorted edge and corner-sharing TcTc7Pb hexagonal bipyramids. The Tc(1)-Tc(2) bond length is 2.79 Å. All Tc(1)-Tc(1) bond lengths are 3.07 Å. The Tc(1)-Pb(1) bond length is 3.12 Å. In the second Tc site, Tc(2) is bonded in a single-bond geometry to one W(1) and one Tc(1) atom. Pb(1) is bonded in a distorted linear geometry to one W(1) and one Tc(1) atom.