The structure described by TbFe6Ga6 crystallizes in the orthorhombic Immm space group. Tb(1) is bonded to four equivalent Fe(1), eight equivalent Fe(2), two equivalent Ga(2), two equivalent Ga(3), and four equivalent Ga(1) atoms to form distorted TbGa8Fe12 hexagonal bipyramids that share corners with eight equivalent Tb(1)Ga8Fe12 hexagonal bipyramids, faces with eight equivalent Fe(1)Tb2Ga6Fe4 cuboctahedra, faces with sixteen equivalent Fe(2)Tb2Ga6Fe4 cuboctahedra, and faces with two equivalent Tb(1)Ga8Fe12 hexagonal bipyramids. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent Tb(1), four equivalent Fe(2), two equivalent Ga(1), two equivalent Ga(2), and two equivalent Ga(3) atoms to form FeTb2Ga6Fe4 cuboctahedra that share corners with six equivalent Fe(1)Tb2Ga6Fe4 cuboctahedra, corners with eight equivalent Fe(2)Tb2Ga6Fe4 cuboctahedra, edges with three equivalent Fe(1)Tb2Ga6Fe4 cuboctahedra, edges with four equivalent Fe(2)Tb2Ga6Fe4 cuboctahedra,  a faceface with one Fe(1)Tb2Ga6Fe4 cuboctahedra, faces with eight equivalent Fe(2)Tb2Ga6Fe4 cuboctahedra, and faces with four equivalent Tb(1)Ga8Fe12 hexagonal bipyramids. In the second Fe site, Fe(2) is bonded to two equivalent Tb(1), two equivalent Fe(1), two equivalent Fe(2), two equivalent Ga(1), two equivalent Ga(2), and two equivalent Ga(3) atoms to form distorted FeTb2Ga6Fe4 cuboctahedra that share corners with four equivalent Fe(1)Tb2Ga6Fe4 cuboctahedra, corners with ten equivalent Fe(2)Tb2Ga6Fe4 cuboctahedra, edges with two equivalent Fe(1)Tb2Ga6Fe4 cuboctahedra, edges with four equivalent Fe(2)Tb2Ga6Fe4 cuboctahedra, faces with four equivalent Fe(1)Tb2Ga6Fe4 cuboctahedra, faces with six equivalent Fe(2)Tb2Ga6Fe4 cuboctahedra, and faces with four equivalent Tb(1)Ga8Fe12 hexagonal bipyramids. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 8-coordinate geometry to two equivalent Tb(1), two equivalent Fe(1), four equivalent Fe(2), and two equivalent Ga(2) atoms. In the second Ga site, Ga(2) is bonded in a 10-coordinate geometry to one Tb(1), two equivalent Fe(1), four equivalent Fe(2), one Ga(2), and two equivalent Ga(1) atoms. In the third Ga site, Ga(3) is bonded in a 8-coordinate geometry to one Tb(1), two equivalent Fe(1), four equivalent Fe(2), and one Ga(3) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Tb(GaFe)6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.565
_cell_length_b   6.565
_cell_length_c   6.565
_cell_angle_alpha   135.160
_cell_angle_beta   98.730
_cell_angle_gamma   97.998
_symmetry_Int_Tables_number   1
_cell_volume   184.405
_cell_formula_units_Z   1
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  0.000  0.000  0.000  1.0
  Ga  Ga1  1  0.813  0.313  0.500  1.0
  Ga  Ga2  1  0.654  0.654  0.000  1.0
  Ga  Ga3  1  0.346  0.346  0.000  1.0
  Ga  Ga4  1  0.334  0.000  0.334  1.0
  Ga  Ga5  1  0.187  0.687  0.500  1.0
  Ga  Ga6  1  0.666  0.000  0.666  1.0
  Fe  Fe7  1  0.757  0.500  0.257  1.0
  Fe  Fe8  1  0.243  0.500  0.743  1.0
  Fe  Fe9  1  0.000  0.000  0.500  1.0
  Fe  Fe10  1  0.500  0.000  0.000  1.0
  Fe  Fe11  1  0.000  0.500  0.000  1.0
  Fe  Fe12  1  0.500  0.500  0.500  1.0
[/CIF]
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The structure described by TbFe6Ga6 crystallizes in the orthorhombic Immm space group. Tb(1) is bonded to four equivalent Fe(1), eight equivalent Fe(2), two equivalent Ga(2), two equivalent Ga(3), and four equivalent Ga(1) atoms to form distorted TbGa8Fe12 hexagonal bipyramids that share corners with eight equivalent Tb(1)Ga8Fe12 hexagonal bipyramids, faces with eight equivalent Fe(1)Tb2Ga6Fe4 cuboctahedra, faces with sixteen equivalent Fe(2)Tb2Ga6Fe4 cuboctahedra, and faces with two equivalent Tb(1)Ga8Fe12 hexagonal bipyramids. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent Tb(1), four equivalent Fe(2), two equivalent Ga(1), two equivalent Ga(2), and two equivalent Ga(3) atoms to form FeTb2Ga6Fe4 cuboctahedra that share corners with six equivalent Fe(1)Tb2Ga6Fe4 cuboctahedra, corners with eight equivalent Fe(2)Tb2Ga6Fe4 cuboctahedra, edges with three equivalent Fe(1)Tb2Ga6Fe4 cuboctahedra, edges with four equivalent Fe(2)Tb2Ga6Fe4 cuboctahedra,  a faceface with one Fe(1)Tb2Ga6Fe4 cuboctahedra, faces with eight equivalent Fe(2)Tb2Ga6Fe4 cuboctahedra, and faces with four equivalent Tb(1)Ga8Fe12 hexagonal bipyramids. In the second Fe site, Fe(2) is bonded to two equivalent Tb(1), two equivalent Fe(1), two equivalent Fe(2), two equivalent Ga(1), two equivalent Ga(2), and two equivalent Ga(3) atoms to form distorted FeTb2Ga6Fe4 cuboctahedra that share corners with four equivalent Fe(1)Tb2Ga6Fe4 cuboctahedra, corners with ten equivalent Fe(2)Tb2Ga6Fe4 cuboctahedra, edges with two equivalent Fe(1)Tb2Ga6Fe4 cuboctahedra, edges with four equivalent Fe(2)Tb2Ga6Fe4 cuboctahedra, faces with four equivalent Fe(1)Tb2Ga6Fe4 cuboctahedra, faces with six equivalent Fe(2)Tb2Ga6Fe4 cuboctahedra, and faces with four equivalent Tb(1)Ga8Fe12 hexagonal bipyramids. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 8-coordinate geometry to two equivalent Tb(1), two equivalent Fe(1), four equivalent Fe(2), and two equivalent Ga(2) atoms. In the second Ga site, Ga(2) is bonded in a 10-coordinate geometry to one Tb(1), two equivalent Fe(1), four equivalent Fe(2), one Ga(2), and two equivalent Ga(1) atoms. In the third Ga site, Ga(3) is bonded in a 8-coordinate geometry to one Tb(1), two equivalent Fe(1), four equivalent Fe(2), and one Ga(3) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Tb(GaFe)6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.565
_cell_length_b   6.565
_cell_length_c   6.565
_cell_angle_alpha   135.160
_cell_angle_beta   98.730
_cell_angle_gamma   97.998
_symmetry_Int_Tables_number   1
_cell_volume   184.405
_cell_formula_units_Z   1
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  0.000  0.000  0.000  1.0
  Ga  Ga1  1  0.813  0.313  0.500  1.0
  Ga  Ga2  1  0.654  0.654  0.000  1.0
  Ga  Ga3  1  0.346  0.346  0.000  1.0
  Ga  Ga4  1  0.334  0.000  0.334  1.0
  Ga  Ga5  1  0.187  0.687  0.500  1.0
  Ga  Ga6  1  0.666  0.000  0.666  1.0
  Fe  Fe7  1  0.757  0.500  0.257  1.0
  Fe  Fe8  1  0.243  0.500  0.743  1.0
  Fe  Fe9  1  0.000  0.000  0.500  1.0
  Fe  Fe10  1  0.500  0.000  0.000  1.0
  Fe  Fe11  1  0.000  0.500  0.000  1.0
  Fe  Fe12  1  0.500  0.500  0.500  1.0
[/CIF]
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