The compound described by Tc3Pb is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. There are three inequivalent Tc sites. In the first Tc site, Tc(1) is bonded to eight equivalent Tc(1) and four equivalent Pb(1) atoms to form distorted TcTc8Pb4 cuboctahedra that share corners with four equivalent Pb(1)Tc12 cuboctahedra; corners with fourteen Tc(1,1)Tc8Pb4 cuboctahedra; edges with six equivalent Pb(1)Tc12 cuboctahedra; edges with twelve equivalent Tc(1)Tc8Pb4 cuboctahedra; faces with four equivalent Pb(1)Tc12 cuboctahedra; and faces with sixteen Tc(1,1,1)Tc8Pb4 cuboctahedra. In the second Tc site, Tc(1) is bonded to eight Tc(1,1,1) and four equivalent Pb(1) atoms to form distorted TcTc8Pb4 cuboctahedra that share corners with four equivalent Pb(1)Tc12 cuboctahedra; corners with fourteen Tc(1,1)Tc8Pb4 cuboctahedra; edges with six equivalent Pb(1)Tc12 cuboctahedra; edges with twelve Tc(1,1,1)Tc8Pb4 cuboctahedra; faces with four equivalent Pb(1)Tc12 cuboctahedra; and faces with sixteen Tc(1,1,1)Tc8Pb4 cuboctahedra. In the third Tc site, Tc(1) is bonded to eight equivalent Tc(1) and four equivalent Pb(1) atoms to form distorted TcTc8Pb4 cuboctahedra that share corners with four equivalent Pb(1)Tc12 cuboctahedra; corners with fourteen Tc(1,1)Tc8Pb4 cuboctahedra; edges with six equivalent Pb(1)Tc12 cuboctahedra; edges with twelve equivalent Tc(1)Tc8Pb4 cuboctahedra; faces with four equivalent Pb(1)Tc12 cuboctahedra; and faces with sixteen Tc(1,1,1)Tc8Pb4 cuboctahedra. Pb(1) is bonded to twelve Tc(1,1,1) atoms to form PbTc12 cuboctahedra that share corners with six equivalent Pb(1)Tc12 cuboctahedra; corners with twelve Tc(1,1)Tc8Pb4 cuboctahedra; edges with eighteen Tc(1,1,1)Tc8Pb4 cuboctahedra; faces with eight equivalent Pb(1)Tc12 cuboctahedra; and faces with twelve Tc(1,1,1)Tc8Pb4 cuboctahedra. is represented by the CIF file [CIF]
data_Tc3Pb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.825
_cell_length_b   5.825
_cell_length_c   4.539
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   133.351
_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
  Tc  Tc0  1  0.844  0.156  0.750  1.0
  Tc  Tc1  1  0.312  0.156  0.750  1.0
  Tc  Tc2  1  0.844  0.688  0.750  1.0
  Tc  Tc3  1  0.156  0.844  0.250  1.0
  Tc  Tc4  1  0.688  0.844  0.250  1.0
  Tc  Tc5  1  0.156  0.312  0.250  1.0
  Pb  Pb6  1  0.667  0.333  0.250  1.0
  Pb  Pb7  1  0.333  0.667  0.750  1.0
[/CIF]
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The compound described by Tc3Pb is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. There are three inequivalent Tc sites. In the first Tc site, Tc(1) is bonded to eight equivalent Tc(1) and four equivalent Pb(1) atoms to form distorted TcTc8Pb4 cuboctahedra that share corners with four equivalent Pb(1)Tc12 cuboctahedra; corners with fourteen Tc(1,1)Tc8Pb4 cuboctahedra; edges with six equivalent Pb(1)Tc12 cuboctahedra; edges with twelve equivalent Tc(1)Tc8Pb4 cuboctahedra; faces with four equivalent Pb(1)Tc12 cuboctahedra; and faces with sixteen Tc(1,1,1)Tc8Pb4 cuboctahedra. In the second Tc site, Tc(1) is bonded to eight Tc(1,1,1) and four equivalent Pb(1) atoms to form distorted TcTc8Pb4 cuboctahedra that share corners with four equivalent Pb(1)Tc12 cuboctahedra; corners with fourteen Tc(1,1)Tc8Pb4 cuboctahedra; edges with six equivalent Pb(1)Tc12 cuboctahedra; edges with twelve Tc(1,1,1)Tc8Pb4 cuboctahedra; faces with four equivalent Pb(1)Tc12 cuboctahedra; and faces with sixteen Tc(1,1,1)Tc8Pb4 cuboctahedra. In the third Tc site, Tc(1) is bonded to eight equivalent Tc(1) and four equivalent Pb(1) atoms to form distorted TcTc8Pb4 cuboctahedra that share corners with four equivalent Pb(1)Tc12 cuboctahedra; corners with fourteen Tc(1,1)Tc8Pb4 cuboctahedra; edges with six equivalent Pb(1)Tc12 cuboctahedra; edges with twelve equivalent Tc(1)Tc8Pb4 cuboctahedra; faces with four equivalent Pb(1)Tc12 cuboctahedra; and faces with sixteen Tc(1,1,1)Tc8Pb4 cuboctahedra. Pb(1) is bonded to twelve Tc(1,1,1) atoms to form PbTc12 cuboctahedra that share corners with six equivalent Pb(1)Tc12 cuboctahedra; corners with twelve Tc(1,1)Tc8Pb4 cuboctahedra; edges with eighteen Tc(1,1,1)Tc8Pb4 cuboctahedra; faces with eight equivalent Pb(1)Tc12 cuboctahedra; and faces with twelve Tc(1,1,1)Tc8Pb4 cuboctahedra. is represented by the CIF file [CIF]
data_Tc3Pb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.825
_cell_length_b   5.825
_cell_length_c   4.539
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   133.351
_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
  Tc  Tc0  1  0.844  0.156  0.750  1.0
  Tc  Tc1  1  0.312  0.156  0.750  1.0
  Tc  Tc2  1  0.844  0.688  0.750  1.0
  Tc  Tc3  1  0.156  0.844  0.250  1.0
  Tc  Tc4  1  0.688  0.844  0.250  1.0
  Tc  Tc5  1  0.156  0.312  0.250  1.0
  Pb  Pb6  1  0.667  0.333  0.250  1.0
  Pb  Pb7  1  0.333  0.667  0.750  1.0
[/CIF]
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