The crystal structure described by Tb2FeSi2 crystallizes in the monoclinic C2/m space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 6-coordinate geometry to two equivalent Fe(1), one Si(2), and five equivalent Si(1) atoms. In the second Tb site, Tb(2) is bonded in a 10-coordinate geometry to four equivalent Fe(1), two equivalent Si(1), and four equivalent Si(2) atoms. Fe(1) is bonded in a 10-coordinate geometry to two equivalent Tb(1), four equivalent Tb(2), one Si(1), and three 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 two equivalent Tb(2), five equivalent Tb(1), one Fe(1), and one Si(1) atom. In the second Si site, Si(2) is bonded in a 8-coordinate geometry to one Tb(1), four equivalent Tb(2), and three equivalent Fe(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Tb2FeSi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.690
_cell_length_b   5.690
_cell_length_c   10.024
_cell_angle_alpha   62.640
_cell_angle_beta   62.640
_cell_angle_gamma   42.758
_symmetry_Int_Tables_number   1
_cell_volume   191.642
_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  0.189  0.189  0.892  1.0
  Tb  Tb1  1  0.811  0.811  0.108  1.0
  Tb  Tb2  1  0.999  0.999  0.672  1.0
  Tb  Tb3  1  0.001  0.001  0.328  1.0
  Fe  Fe4  1  0.728  0.728  0.623  1.0
  Fe  Fe5  1  0.272  0.272  0.377  1.0
  Si  Si6  1  0.502  0.502  0.873  1.0
  Si  Si7  1  0.498  0.498  0.127  1.0
  Si  Si8  1  0.343  0.343  0.564  1.0
  Si  Si9  1  0.657  0.657  0.436  1.0
[/CIF]
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The crystal structure described by Tb2FeSi2 crystallizes in the monoclinic C2/m space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 6-coordinate geometry to two equivalent Fe(1), one Si(2), and five equivalent Si(1) atoms. In the second Tb site, Tb(2) is bonded in a 10-coordinate geometry to four equivalent Fe(1), two equivalent Si(1), and four equivalent Si(2) atoms. Fe(1) is bonded in a 10-coordinate geometry to two equivalent Tb(1), four equivalent Tb(2), one Si(1), and three 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 two equivalent Tb(2), five equivalent Tb(1), one Fe(1), and one Si(1) atom. In the second Si site, Si(2) is bonded in a 8-coordinate geometry to one Tb(1), four equivalent Tb(2), and three equivalent Fe(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Tb2FeSi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.690
_cell_length_b   5.690
_cell_length_c   10.024
_cell_angle_alpha   62.640
_cell_angle_beta   62.640
_cell_angle_gamma   42.758
_symmetry_Int_Tables_number   1
_cell_volume   191.642
_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  0.189  0.189  0.892  1.0
  Tb  Tb1  1  0.811  0.811  0.108  1.0
  Tb  Tb2  1  0.999  0.999  0.672  1.0
  Tb  Tb3  1  0.001  0.001  0.328  1.0
  Fe  Fe4  1  0.728  0.728  0.623  1.0
  Fe  Fe5  1  0.272  0.272  0.377  1.0
  Si  Si6  1  0.502  0.502  0.873  1.0
  Si  Si7  1  0.498  0.498  0.127  1.0
  Si  Si8  1  0.343  0.343  0.564  1.0
  Si  Si9  1  0.657  0.657  0.436  1.0
[/CIF]
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