The material structure described by Tb3Si crystallizes in the hexagonal P6_3/mmc space group. Tb(1) is bonded in a 4-coordinate geometry to four equivalent Si(1) atoms. Si(1) is bonded to twelve equivalent Tb(1) atoms to form a mixture of corner and face-sharing SiTb12 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Tb3Si
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.723
_cell_length_b   6.723
_cell_length_c   5.101
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   199.701
_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
  Tb  Tb0  1  0.178  0.355  0.250  1.0
  Tb  Tb1  1  0.645  0.822  0.250  1.0
  Tb  Tb2  1  0.178  0.822  0.250  1.0
  Tb  Tb3  1  0.822  0.645  0.750  1.0
  Tb  Tb4  1  0.355  0.178  0.750  1.0
  Tb  Tb5  1  0.822  0.178  0.750  1.0
  Si  Si6  1  0.333  0.667  0.750  1.0
  Si  Si7  1  0.667  0.333  0.250  1.0
[/CIF]
.
The material structure described by Tb3Si crystallizes in the hexagonal P6_3/mmc space group. Tb(1) is bonded in a 4-coordinate geometry to four equivalent Si(1) atoms. Si(1) is bonded to twelve equivalent Tb(1) atoms to form a mixture of corner and face-sharing SiTb12 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Tb3Si
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.723
_cell_length_b   6.723
_cell_length_c   5.101
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   199.701
_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
  Tb  Tb0  1  0.178  0.355  0.250  1.0
  Tb  Tb1  1  0.645  0.822  0.250  1.0
  Tb  Tb2  1  0.178  0.822  0.250  1.0
  Tb  Tb3  1  0.822  0.645  0.750  1.0
  Tb  Tb4  1  0.355  0.178  0.750  1.0
  Tb  Tb5  1  0.822  0.178  0.750  1.0
  Si  Si6  1  0.333  0.667  0.750  1.0
  Si  Si7  1  0.667  0.333  0.250  1.0
[/CIF]
.