The compound described by Tc3Sn crystallizes in the hexagonal P-6m2 space group. There are two inequivalent Tc sites. In the first Tc site, Tc(1) is bonded to six equivalent Tc(1) and six equivalent Tc(2) atoms to form TcTc12 cuboctahedra that share corners with six equivalent Tc(1)Tc12 cuboctahedra, corners with twelve equivalent Sn(1)Tc6Sn6 cuboctahedra, edges with six equivalent Tc(1)Tc12 cuboctahedra, edges with twelve equivalent Tc(2)Tc9Sn3 cuboctahedra, faces with two equivalent Sn(1)Tc6Sn6 cuboctahedra, faces with six equivalent Tc(1)Tc12 cuboctahedra, and faces with twelve equivalent Tc(2)Tc9Sn3 cuboctahedra. In the second Tc site, Tc(2) is bonded to three equivalent Tc(1), six equivalent Tc(2), and three equivalent Sn(1) atoms to form TcTc9Sn3 cuboctahedra that share corners with eighteen equivalent Tc(2)Tc9Sn3 cuboctahedra, edges with six equivalent Tc(1)Tc12 cuboctahedra, edges with six equivalent Tc(2)Tc9Sn3 cuboctahedra, edges with six equivalent Sn(1)Tc6Sn6 cuboctahedra, faces with six equivalent Tc(1)Tc12 cuboctahedra, faces with six equivalent Sn(1)Tc6Sn6 cuboctahedra, and faces with eight equivalent Tc(2)Tc9Sn3 cuboctahedra. Sn(1) is bonded to six equivalent Tc(2) and six equivalent Sn(1) atoms to form SnTc6Sn6 cuboctahedra that share corners with six equivalent Sn(1)Tc6Sn6 cuboctahedra, corners with twelve equivalent Tc(1)Tc12 cuboctahedra, edges with six equivalent Sn(1)Tc6Sn6 cuboctahedra, edges with twelve equivalent Tc(2)Tc9Sn3 cuboctahedra, faces with two equivalent Tc(1)Tc12 cuboctahedra, faces with six equivalent Sn(1)Tc6Sn6 cuboctahedra, and faces with twelve equivalent Tc(2)Tc9Sn3 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Tc3Sn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.942
_cell_length_b   2.941
_cell_length_c   8.633
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   60.003
_symmetry_Int_Tables_number   1
_cell_volume   64.698
_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  Tc0  1  0.333  0.333  0.875  1.0
  Tc  Tc1  1  0.667  0.667  0.113  1.0
  Tc  Tc2  1  0.667  0.667  0.637  1.0
  Sn  Sn3  1  0.333  0.333  0.375  1.0
[/CIF]
.
The compound described by Tc3Sn crystallizes in the hexagonal P-6m2 space group. There are two inequivalent Tc sites. In the first Tc site, Tc(1) is bonded to six equivalent Tc(1) and six equivalent Tc(2) atoms to form TcTc12 cuboctahedra that share corners with six equivalent Tc(1)Tc12 cuboctahedra, corners with twelve equivalent Sn(1)Tc6Sn6 cuboctahedra, edges with six equivalent Tc(1)Tc12 cuboctahedra, edges with twelve equivalent Tc(2)Tc9Sn3 cuboctahedra, faces with two equivalent Sn(1)Tc6Sn6 cuboctahedra, faces with six equivalent Tc(1)Tc12 cuboctahedra, and faces with twelve equivalent Tc(2)Tc9Sn3 cuboctahedra. In the second Tc site, Tc(2) is bonded to three equivalent Tc(1), six equivalent Tc(2), and three equivalent Sn(1) atoms to form TcTc9Sn3 cuboctahedra that share corners with eighteen equivalent Tc(2)Tc9Sn3 cuboctahedra, edges with six equivalent Tc(1)Tc12 cuboctahedra, edges with six equivalent Tc(2)Tc9Sn3 cuboctahedra, edges with six equivalent Sn(1)Tc6Sn6 cuboctahedra, faces with six equivalent Tc(1)Tc12 cuboctahedra, faces with six equivalent Sn(1)Tc6Sn6 cuboctahedra, and faces with eight equivalent Tc(2)Tc9Sn3 cuboctahedra. Sn(1) is bonded to six equivalent Tc(2) and six equivalent Sn(1) atoms to form SnTc6Sn6 cuboctahedra that share corners with six equivalent Sn(1)Tc6Sn6 cuboctahedra, corners with twelve equivalent Tc(1)Tc12 cuboctahedra, edges with six equivalent Sn(1)Tc6Sn6 cuboctahedra, edges with twelve equivalent Tc(2)Tc9Sn3 cuboctahedra, faces with two equivalent Tc(1)Tc12 cuboctahedra, faces with six equivalent Sn(1)Tc6Sn6 cuboctahedra, and faces with twelve equivalent Tc(2)Tc9Sn3 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Tc3Sn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.942
_cell_length_b   2.941
_cell_length_c   8.633
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   60.003
_symmetry_Int_Tables_number   1
_cell_volume   64.698
_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  Tc0  1  0.333  0.333  0.875  1.0
  Tc  Tc1  1  0.667  0.667  0.113  1.0
  Tc  Tc2  1  0.667  0.667  0.637  1.0
  Sn  Sn3  1  0.333  0.333  0.375  1.0
[/CIF]
.