The crystal structure described by TaTcPb2 crystallizes in the cubic F-43m space group. Ta(1) is bonded in a distorted body-centered cubic geometry to four equivalent Tc(1), four equivalent Pb(2), and six equivalent Pb(1) atoms. Tc(1) is bonded in a distorted body-centered cubic geometry to four equivalent Ta(1) and four equivalent Pb(1) atoms. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded to six equivalent Ta(1), four equivalent Tc(1), and four equivalent Pb(2) atoms to form distorted PbTa6Tc4Pb4 tetrahedra that share corners with six equivalent Pb(1)Ta6Tc4Pb4 tetrahedra, corners with twelve equivalent Pb(2)Ta4Pb4 tetrahedra, faces with four equivalent Pb(2)Ta4Pb4 tetrahedra, and faces with twelve equivalent Pb(1)Ta6Tc4Pb4 tetrahedra. In the second Pb site, Pb(2) is bonded to four equivalent Ta(1) and four equivalent Pb(1) atoms to form distorted PbTa4Pb4 tetrahedra that share corners with twelve equivalent Pb(1)Ta6Tc4Pb4 tetrahedra, edges with twelve equivalent Pb(2)Ta4Pb4 tetrahedra, and faces with four equivalent Pb(1)Ta6Tc4Pb4 tetrahedra. is represented by the CIF file [CIF]
data_TaTcPb2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.927
_cell_length_b   4.927
_cell_length_c   4.927
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   84.582
_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
  Ta  Ta0  1  0.500  0.500  0.500  1.0
  Tc  Tc1  1  0.250  0.250  0.250  1.0
  Pb  Pb2  1  0.000  0.000  0.000  1.0
  Pb  Pb3  1  0.750  0.750  0.750  1.0
[/CIF]
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The crystal structure described by TaTcPb2 crystallizes in the cubic F-43m space group. Ta(1) is bonded in a distorted body-centered cubic geometry to four equivalent Tc(1), four equivalent Pb(2), and six equivalent Pb(1) atoms. Tc(1) is bonded in a distorted body-centered cubic geometry to four equivalent Ta(1) and four equivalent Pb(1) atoms. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded to six equivalent Ta(1), four equivalent Tc(1), and four equivalent Pb(2) atoms to form distorted PbTa6Tc4Pb4 tetrahedra that share corners with six equivalent Pb(1)Ta6Tc4Pb4 tetrahedra, corners with twelve equivalent Pb(2)Ta4Pb4 tetrahedra, faces with four equivalent Pb(2)Ta4Pb4 tetrahedra, and faces with twelve equivalent Pb(1)Ta6Tc4Pb4 tetrahedra. In the second Pb site, Pb(2) is bonded to four equivalent Ta(1) and four equivalent Pb(1) atoms to form distorted PbTa4Pb4 tetrahedra that share corners with twelve equivalent Pb(1)Ta6Tc4Pb4 tetrahedra, edges with twelve equivalent Pb(2)Ta4Pb4 tetrahedra, and faces with four equivalent Pb(1)Ta6Tc4Pb4 tetrahedra. is represented by the CIF file [CIF]
data_TaTcPb2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.927
_cell_length_b   4.927
_cell_length_c   4.927
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   84.582
_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
  Ta  Ta0  1  0.500  0.500  0.500  1.0
  Tc  Tc1  1  0.250  0.250  0.250  1.0
  Pb  Pb2  1  0.000  0.000  0.000  1.0
  Pb  Pb3  1  0.750  0.750  0.750  1.0
[/CIF]
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