The structure described by TbFeSi2 crystallizes in the monoclinic P2_1/m space group. Tb(1) is bonded in a 12-coordinate geometry to three equivalent Fe(1), three equivalent Si(2), and six equivalent Si(1) atoms. Fe(1) is bonded in a 5-coordinate geometry to three equivalent Tb(1), one Si(1), and four equivalent Si(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to six equivalent Tb(1), one Fe(1), and two equivalent Si(1) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to three equivalent Tb(1), four equivalent Fe(1), and two equivalent Si(2) atoms. is represented by the CIF file [CIF]
data_TbFeSi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.959
_cell_length_b   4.254
_cell_length_c   7.916
_cell_angle_alpha   76.310
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   129.523
_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  0.250  0.606  0.792  1.0
  Tb  Tb1  1  0.750  0.394  0.208  1.0
  Fe  Fe2  1  0.250  0.885  0.391  1.0
  Fe  Fe3  1  0.750  0.115  0.609  1.0
  Si  Si4  1  0.250  0.957  0.099  1.0
  Si  Si5  1  0.750  0.043  0.901  1.0
  Si  Si6  1  0.250  0.328  0.496  1.0
  Si  Si7  1  0.750  0.672  0.504  1.0
[/CIF]
.
The structure described by TbFeSi2 crystallizes in the monoclinic P2_1/m space group. Tb(1) is bonded in a 12-coordinate geometry to three equivalent Fe(1), three equivalent Si(2), and six equivalent Si(1) atoms. Fe(1) is bonded in a 5-coordinate geometry to three equivalent Tb(1), one Si(1), and four equivalent Si(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to six equivalent Tb(1), one Fe(1), and two equivalent Si(1) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to three equivalent Tb(1), four equivalent Fe(1), and two equivalent Si(2) atoms. is represented by the CIF file [CIF]
data_TbFeSi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.959
_cell_length_b   4.254
_cell_length_c   7.916
_cell_angle_alpha   76.310
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   129.523
_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  0.250  0.606  0.792  1.0
  Tb  Tb1  1  0.750  0.394  0.208  1.0
  Fe  Fe2  1  0.250  0.885  0.391  1.0
  Fe  Fe3  1  0.750  0.115  0.609  1.0
  Si  Si4  1  0.250  0.957  0.099  1.0
  Si  Si5  1  0.750  0.043  0.901  1.0
  Si  Si6  1  0.250  0.328  0.496  1.0
  Si  Si7  1  0.750  0.672  0.504  1.0
[/CIF]
.