The crystal structure described by Tb5Bi3 crystallizes in the orthorhombic Pnma space group. There are four inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to one Bi(1) and four equivalent Bi(2) atoms to form distorted TbBi5 trigonal bipyramids that share corners with six equivalent Tb(4)Bi6 octahedra, corners with four equivalent Tb(3)Bi5 square pyramids, edges with two equivalent Tb(4)Bi6 octahedra,  an edgeedge with one Tb(3)Bi5 square pyramid, edges with two equivalent Tb(1)Bi5 trigonal bipyramids, and  a faceface with one Tb(3)Bi5 square pyramid. The corner-sharing octahedral tilt angles range from 31-41°. In the second Tb site, Tb(2) is bonded in a 5-coordinate geometry to two equivalent Bi(1) and three equivalent Bi(2) atoms. In the third Tb site, Tb(3) is bonded to one Bi(1) and four equivalent Bi(2) atoms to form distorted TbBi5 square pyramids that share corners with five equivalent Tb(4)Bi6 octahedra, corners with four equivalent Tb(1)Bi5 trigonal bipyramids,  an edgeedge with one Tb(4)Bi6 octahedra, edges with two equivalent Tb(3)Bi5 square pyramids,  an edgeedge with one Tb(1)Bi5 trigonal bipyramid,  a faceface with one Tb(4)Bi6 octahedra, and  a faceface with one Tb(1)Bi5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 37-46°. In the fourth Tb site, Tb(4) is bonded to two equivalent Bi(1) and four equivalent Bi(2) atoms to form distorted TbBi6 octahedra that share corners with five equivalent Tb(3)Bi5 square pyramids, corners with six equivalent Tb(1)Bi5 trigonal bipyramids,  an edgeedge with one Tb(3)Bi5 square pyramid, edges with two equivalent Tb(1)Bi5 trigonal bipyramids, faces with two equivalent Tb(4)Bi6 octahedra, and  a faceface with one Tb(3)Bi5 square pyramid. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 8-coordinate geometry to one Tb(1), one Tb(3), two equivalent Tb(4), and four equivalent Tb(2) atoms. In the second Bi site, Bi(2) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Tb(3), two equivalent Tb(4), and three equivalent Tb(2) atoms. is represented by the CIF file [CIF]
data_Tb5Bi3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.275
_cell_length_b   9.508
_cell_length_c   12.103
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   952.315
_cell_formula_units_Z   4
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  0.355  0.750  0.214  1.0
  Tb  Tb1  1  0.855  0.750  0.286  1.0
  Tb  Tb2  1  0.645  0.250  0.786  1.0
  Tb  Tb3  1  0.145  0.250  0.714  1.0
  Tb  Tb4  1  0.694  0.563  0.059  1.0
  Tb  Tb5  1  0.194  0.937  0.441  1.0
  Tb  Tb6  1  0.306  0.063  0.941  1.0
  Tb  Tb7  1  0.806  0.437  0.559  1.0
  Tb  Tb8  1  0.306  0.437  0.941  1.0
  Tb  Tb9  1  0.806  0.063  0.559  1.0
  Tb  Tb10  1  0.694  0.937  0.059  1.0
  Tb  Tb11  1  0.194  0.563  0.441  1.0
  Tb  Tb12  1  0.475  0.250  0.488  1.0
  Tb  Tb13  1  0.975  0.250  0.012  1.0
  Tb  Tb14  1  0.525  0.750  0.512  1.0
  Tb  Tb15  1  0.025  0.750  0.988  1.0
  Tb  Tb16  1  0.315  0.250  0.219  1.0
  Tb  Tb17  1  0.815  0.250  0.281  1.0
  Tb  Tb18  1  0.685  0.750  0.781  1.0
  Tb  Tb19  1  0.185  0.750  0.719  1.0
  Bi  Bi20  1  0.410  0.750  0.958  1.0
  Bi  Bi21  1  0.910  0.750  0.542  1.0
  Bi  Bi22  1  0.590  0.250  0.042  1.0
  Bi  Bi23  1  0.090  0.250  0.458  1.0
  Bi  Bi24  1  0.566  0.996  0.326  1.0
  Bi  Bi25  1  0.066  0.504  0.174  1.0
  Bi  Bi26  1  0.434  0.496  0.674  1.0
  Bi  Bi27  1  0.934  0.004  0.826  1.0
  Bi  Bi28  1  0.434  0.004  0.674  1.0
  Bi  Bi29  1  0.934  0.496  0.826  1.0
  Bi  Bi30  1  0.566  0.504  0.326  1.0
  Bi  Bi31  1  0.066  0.996  0.174  1.0
[/CIF]
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The crystal structure described by Tb5Bi3 crystallizes in the orthorhombic Pnma space group. There are four inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to one Bi(1) and four equivalent Bi(2) atoms to form distorted TbBi5 trigonal bipyramids that share corners with six equivalent Tb(4)Bi6 octahedra, corners with four equivalent Tb(3)Bi5 square pyramids, edges with two equivalent Tb(4)Bi6 octahedra,  an edgeedge with one Tb(3)Bi5 square pyramid, edges with two equivalent Tb(1)Bi5 trigonal bipyramids, and  a faceface with one Tb(3)Bi5 square pyramid. The corner-sharing octahedral tilt angles range from 31-41°. In the second Tb site, Tb(2) is bonded in a 5-coordinate geometry to two equivalent Bi(1) and three equivalent Bi(2) atoms. In the third Tb site, Tb(3) is bonded to one Bi(1) and four equivalent Bi(2) atoms to form distorted TbBi5 square pyramids that share corners with five equivalent Tb(4)Bi6 octahedra, corners with four equivalent Tb(1)Bi5 trigonal bipyramids,  an edgeedge with one Tb(4)Bi6 octahedra, edges with two equivalent Tb(3)Bi5 square pyramids,  an edgeedge with one Tb(1)Bi5 trigonal bipyramid,  a faceface with one Tb(4)Bi6 octahedra, and  a faceface with one Tb(1)Bi5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 37-46°. In the fourth Tb site, Tb(4) is bonded to two equivalent Bi(1) and four equivalent Bi(2) atoms to form distorted TbBi6 octahedra that share corners with five equivalent Tb(3)Bi5 square pyramids, corners with six equivalent Tb(1)Bi5 trigonal bipyramids,  an edgeedge with one Tb(3)Bi5 square pyramid, edges with two equivalent Tb(1)Bi5 trigonal bipyramids, faces with two equivalent Tb(4)Bi6 octahedra, and  a faceface with one Tb(3)Bi5 square pyramid. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 8-coordinate geometry to one Tb(1), one Tb(3), two equivalent Tb(4), and four equivalent Tb(2) atoms. In the second Bi site, Bi(2) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Tb(3), two equivalent Tb(4), and three equivalent Tb(2) atoms. is represented by the CIF file [CIF]
data_Tb5Bi3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.275
_cell_length_b   9.508
_cell_length_c   12.103
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   952.315
_cell_formula_units_Z   4
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  0.355  0.750  0.214  1.0
  Tb  Tb1  1  0.855  0.750  0.286  1.0
  Tb  Tb2  1  0.645  0.250  0.786  1.0
  Tb  Tb3  1  0.145  0.250  0.714  1.0
  Tb  Tb4  1  0.694  0.563  0.059  1.0
  Tb  Tb5  1  0.194  0.937  0.441  1.0
  Tb  Tb6  1  0.306  0.063  0.941  1.0
  Tb  Tb7  1  0.806  0.437  0.559  1.0
  Tb  Tb8  1  0.306  0.437  0.941  1.0
  Tb  Tb9  1  0.806  0.063  0.559  1.0
  Tb  Tb10  1  0.694  0.937  0.059  1.0
  Tb  Tb11  1  0.194  0.563  0.441  1.0
  Tb  Tb12  1  0.475  0.250  0.488  1.0
  Tb  Tb13  1  0.975  0.250  0.012  1.0
  Tb  Tb14  1  0.525  0.750  0.512  1.0
  Tb  Tb15  1  0.025  0.750  0.988  1.0
  Tb  Tb16  1  0.315  0.250  0.219  1.0
  Tb  Tb17  1  0.815  0.250  0.281  1.0
  Tb  Tb18  1  0.685  0.750  0.781  1.0
  Tb  Tb19  1  0.185  0.750  0.719  1.0
  Bi  Bi20  1  0.410  0.750  0.958  1.0
  Bi  Bi21  1  0.910  0.750  0.542  1.0
  Bi  Bi22  1  0.590  0.250  0.042  1.0
  Bi  Bi23  1  0.090  0.250  0.458  1.0
  Bi  Bi24  1  0.566  0.996  0.326  1.0
  Bi  Bi25  1  0.066  0.504  0.174  1.0
  Bi  Bi26  1  0.434  0.496  0.674  1.0
  Bi  Bi27  1  0.934  0.004  0.826  1.0
  Bi  Bi28  1  0.434  0.004  0.674  1.0
  Bi  Bi29  1  0.934  0.496  0.826  1.0
  Bi  Bi30  1  0.566  0.504  0.326  1.0
  Bi  Bi31  1  0.066  0.996  0.174  1.0
[/CIF]
.