The crystal structure described by TbFe2Al is Frank-Kasper $\mu$ Phase-derived structured and crystallizes in the trigonal P-3m1 space group. There are three inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 12-coordinate geometry to three equivalent Fe(4) and nine equivalent Al(1) atoms. In the second Tb site, Tb(2) is bonded in a 12-coordinate geometry to three equivalent Fe(3) and nine equivalent Fe(5) atoms. In the third Tb site, Tb(3) is bonded in a 18-coordinate geometry to three equivalent Fe(1), three equivalent Fe(2), six equivalent Fe(5), and six equivalent Al(1) atoms. There are five inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 9-coordinate geometry to three equivalent Tb(3), three equivalent Fe(5), and three equivalent Al(1) atoms. In the second Fe site, Fe(2) is bonded in a 9-coordinate geometry to three equivalent Tb(3), three equivalent Fe(5), and three equivalent Al(1) atoms. In the third Fe site, Fe(3) is bonded to six equivalent Tb(2) and six equivalent Fe(5) atoms to form FeTb6Fe6 cuboctahedra that share corners with twelve equivalent Fe(5)Tb5Fe7 cuboctahedra, edges with six equivalent Fe(3)Tb6Fe6 cuboctahedra, and faces with eighteen equivalent Fe(5)Tb5Fe7 cuboctahedra. In the fourth Fe site, Fe(4) is bonded to six equivalent Tb(1) and six equivalent Al(1) atoms to form FeTb6Al6 cuboctahedra that share corners with twelve equivalent Al(1)Tb5Al4Fe3 cuboctahedra, edges with six equivalent Fe(4)Tb6Al6 cuboctahedra, and faces with eighteen equivalent Al(1)Tb5Al4Fe3 cuboctahedra. In the fifth Fe site, Fe(5) is bonded to two equivalent Tb(3), three equivalent Tb(2), one Fe(1), one Fe(2), one Fe(3), and four equivalent Fe(5) atoms to form FeTb5Fe7 cuboctahedra that share corners with two equivalent Fe(3)Tb6Fe6 cuboctahedra, corners with six equivalent Al(1)Tb5Al4Fe3 cuboctahedra, corners with nine equivalent Fe(5)Tb5Fe7 cuboctahedra, edges with four equivalent Fe(5)Tb5Fe7 cuboctahedra, edges with four equivalent Al(1)Tb5Al4Fe3 cuboctahedra,  a faceface with one Al(1)Tb5Al4Fe3 cuboctahedra, faces with three equivalent Fe(3)Tb6Fe6 cuboctahedra, and faces with ten equivalent Fe(5)Tb5Fe7 cuboctahedra. Al(1) is bonded to two equivalent Tb(3), three equivalent Tb(1), one Fe(1), one Fe(2), one Fe(4), and four equivalent Al(1) atoms to form distorted AlTb5Al4Fe3 cuboctahedra that share corners with two equivalent Fe(4)Tb6Al6 cuboctahedra, corners with six equivalent Fe(5)Tb5Fe7 cuboctahedra, corners with nine equivalent Al(1)Tb5Al4Fe3 cuboctahedra, edges with four equivalent Fe(5)Tb5Fe7 cuboctahedra, edges with four equivalent Al(1)Tb5Al4Fe3 cuboctahedra,  a faceface with one Fe(5)Tb5Fe7 cuboctahedra, faces with three equivalent Fe(4)Tb6Al6 cuboctahedra, and faces with ten equivalent Al(1)Tb5Al4Fe3 cuboctahedra. is represented by the CIF card [CIF]
data_TbAlFe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.306
_cell_length_b   5.305
_cell_length_c   16.322
_cell_angle_alpha   90.000
_cell_angle_beta   90.004
_cell_angle_gamma   60.005
_symmetry_Int_Tables_number   1
_cell_volume   397.913
_cell_formula_units_Z   6
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  0.333  0.333  0.031  1.0
  Tb  Tb1  1  0.667  0.667  0.969  1.0
  Tb  Tb2  1  0.667  0.667  0.533  1.0
  Tb  Tb3  1  0.333  0.333  0.467  1.0
  Tb  Tb4  1  0.333  0.333  0.261  1.0
  Tb  Tb5  1  0.667  0.667  0.739  1.0
  Al  Al6  1  0.836  0.329  0.135  1.0
  Al  Al7  1  0.329  0.836  0.135  1.0
  Al  Al8  1  0.836  0.836  0.135  1.0
  Al  Al9  1  0.164  0.671  0.865  1.0
  Al  Al10  1  0.671  0.164  0.865  1.0
  Al  Al11  1  0.164  0.164  0.865  1.0
  Fe  Fe12  1  0.333  0.333  0.739  1.0
  Fe  Fe13  1  0.667  0.667  0.261  1.0
  Fe  Fe14  1  1.000  0.000  0.738  1.0
  Fe  Fe15  1  0.000  1.000  0.262  1.0
  Fe  Fe16  1  0.000  0.000  0.500  1.0
  Fe  Fe17  1  0.000  0.000  0.000  1.0
  Fe  Fe18  1  0.166  0.668  0.625  1.0
  Fe  Fe19  1  0.669  0.166  0.625  1.0
  Fe  Fe20  1  0.166  0.166  0.625  1.0
  Fe  Fe21  1  0.834  0.332  0.375  1.0
  Fe  Fe22  1  0.331  0.834  0.375  1.0
  Fe  Fe23  1  0.834  0.834  0.375  1.0
[/CIF]
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The crystal structure described by TbFe2Al is Frank-Kasper $\mu$ Phase-derived structured and crystallizes in the trigonal P-3m1 space group. There are three inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 12-coordinate geometry to three equivalent Fe(4) and nine equivalent Al(1) atoms. In the second Tb site, Tb(2) is bonded in a 12-coordinate geometry to three equivalent Fe(3) and nine equivalent Fe(5) atoms. In the third Tb site, Tb(3) is bonded in a 18-coordinate geometry to three equivalent Fe(1), three equivalent Fe(2), six equivalent Fe(5), and six equivalent Al(1) atoms. There are five inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 9-coordinate geometry to three equivalent Tb(3), three equivalent Fe(5), and three equivalent Al(1) atoms. In the second Fe site, Fe(2) is bonded in a 9-coordinate geometry to three equivalent Tb(3), three equivalent Fe(5), and three equivalent Al(1) atoms. In the third Fe site, Fe(3) is bonded to six equivalent Tb(2) and six equivalent Fe(5) atoms to form FeTb6Fe6 cuboctahedra that share corners with twelve equivalent Fe(5)Tb5Fe7 cuboctahedra, edges with six equivalent Fe(3)Tb6Fe6 cuboctahedra, and faces with eighteen equivalent Fe(5)Tb5Fe7 cuboctahedra. In the fourth Fe site, Fe(4) is bonded to six equivalent Tb(1) and six equivalent Al(1) atoms to form FeTb6Al6 cuboctahedra that share corners with twelve equivalent Al(1)Tb5Al4Fe3 cuboctahedra, edges with six equivalent Fe(4)Tb6Al6 cuboctahedra, and faces with eighteen equivalent Al(1)Tb5Al4Fe3 cuboctahedra. In the fifth Fe site, Fe(5) is bonded to two equivalent Tb(3), three equivalent Tb(2), one Fe(1), one Fe(2), one Fe(3), and four equivalent Fe(5) atoms to form FeTb5Fe7 cuboctahedra that share corners with two equivalent Fe(3)Tb6Fe6 cuboctahedra, corners with six equivalent Al(1)Tb5Al4Fe3 cuboctahedra, corners with nine equivalent Fe(5)Tb5Fe7 cuboctahedra, edges with four equivalent Fe(5)Tb5Fe7 cuboctahedra, edges with four equivalent Al(1)Tb5Al4Fe3 cuboctahedra,  a faceface with one Al(1)Tb5Al4Fe3 cuboctahedra, faces with three equivalent Fe(3)Tb6Fe6 cuboctahedra, and faces with ten equivalent Fe(5)Tb5Fe7 cuboctahedra. Al(1) is bonded to two equivalent Tb(3), three equivalent Tb(1), one Fe(1), one Fe(2), one Fe(4), and four equivalent Al(1) atoms to form distorted AlTb5Al4Fe3 cuboctahedra that share corners with two equivalent Fe(4)Tb6Al6 cuboctahedra, corners with six equivalent Fe(5)Tb5Fe7 cuboctahedra, corners with nine equivalent Al(1)Tb5Al4Fe3 cuboctahedra, edges with four equivalent Fe(5)Tb5Fe7 cuboctahedra, edges with four equivalent Al(1)Tb5Al4Fe3 cuboctahedra,  a faceface with one Fe(5)Tb5Fe7 cuboctahedra, faces with three equivalent Fe(4)Tb6Al6 cuboctahedra, and faces with ten equivalent Al(1)Tb5Al4Fe3 cuboctahedra. is represented by the CIF card [CIF]
data_TbAlFe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.306
_cell_length_b   5.305
_cell_length_c   16.322
_cell_angle_alpha   90.000
_cell_angle_beta   90.004
_cell_angle_gamma   60.005
_symmetry_Int_Tables_number   1
_cell_volume   397.913
_cell_formula_units_Z   6
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  0.333  0.333  0.031  1.0
  Tb  Tb1  1  0.667  0.667  0.969  1.0
  Tb  Tb2  1  0.667  0.667  0.533  1.0
  Tb  Tb3  1  0.333  0.333  0.467  1.0
  Tb  Tb4  1  0.333  0.333  0.261  1.0
  Tb  Tb5  1  0.667  0.667  0.739  1.0
  Al  Al6  1  0.836  0.329  0.135  1.0
  Al  Al7  1  0.329  0.836  0.135  1.0
  Al  Al8  1  0.836  0.836  0.135  1.0
  Al  Al9  1  0.164  0.671  0.865  1.0
  Al  Al10  1  0.671  0.164  0.865  1.0
  Al  Al11  1  0.164  0.164  0.865  1.0
  Fe  Fe12  1  0.333  0.333  0.739  1.0
  Fe  Fe13  1  0.667  0.667  0.261  1.0
  Fe  Fe14  1  1.000  0.000  0.738  1.0
  Fe  Fe15  1  0.000  1.000  0.262  1.0
  Fe  Fe16  1  0.000  0.000  0.500  1.0
  Fe  Fe17  1  0.000  0.000  0.000  1.0
  Fe  Fe18  1  0.166  0.668  0.625  1.0
  Fe  Fe19  1  0.669  0.166  0.625  1.0
  Fe  Fe20  1  0.166  0.166  0.625  1.0
  Fe  Fe21  1  0.834  0.332  0.375  1.0
  Fe  Fe22  1  0.331  0.834  0.375  1.0
  Fe  Fe23  1  0.834  0.834  0.375  1.0
[/CIF]
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