The material described by TbFe6Ge6 crystallizes in the orthorhombic Cmcm space group. Tb(1) is bonded to four equivalent Fe(1), four equivalent Fe(2), four equivalent Fe(3), one Ge(2), two equivalent Ge(1), two equivalent Ge(3), and three equivalent Ge(5) atoms to form distorted TbFe12Ge8 hexagonal bipyramids that share corners with four equivalent Tb(1)Fe12Ge8 hexagonal bipyramids, faces with eight equivalent Fe(1)Tb2Fe4Ge6 cuboctahedra, faces with eight equivalent Fe(3)Tb2Fe4Ge6 cuboctahedra, and faces with four equivalent Tb(1)Fe12Ge8 hexagonal bipyramids. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent Tb(1), two equivalent Fe(2), two equivalent Fe(3), one Ge(2), one Ge(3), one Ge(4), one Ge(5), and two equivalent Ge(1) atoms to form distorted FeTb2Fe4Ge6 cuboctahedra that share corners with four equivalent Fe(3)Tb2Fe4Ge6 cuboctahedra, corners with six equivalent Fe(1)Tb2Fe4Ge6 cuboctahedra, edges with two equivalent Fe(3)Tb2Fe4Ge6 cuboctahedra, edges with three equivalent Fe(1)Tb2Fe4Ge6 cuboctahedra,  a faceface with one Fe(1)Tb2Fe4Ge6 cuboctahedra, faces with four equivalent Fe(3)Tb2Fe4Ge6 cuboctahedra, and faces with four equivalent Tb(1)Fe12Ge8 hexagonal bipyramids. In the second Fe site, Fe(2) is bonded in a 12-coordinate geometry to two equivalent Tb(1), two equivalent Fe(1), two equivalent Fe(2), two equivalent Ge(1), two equivalent Ge(4), and two equivalent Ge(5) atoms. In the third Fe site, Fe(3) is bonded to two equivalent Tb(1), two equivalent Fe(1), two equivalent Fe(3), two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms to form distorted FeTb2Fe4Ge6 cuboctahedra that share corners with four equivalent Fe(1)Tb2Fe4Ge6 cuboctahedra, corners with four equivalent Fe(3)Tb2Fe4Ge6 cuboctahedra, edges with two equivalent Fe(1)Tb2Fe4Ge6 cuboctahedra, edges with two equivalent Fe(3)Tb2Fe4Ge6 cuboctahedra, faces with four equivalent Fe(1)Tb2Fe4Ge6 cuboctahedra, faces with four equivalent Fe(3)Tb2Fe4Ge6 cuboctahedra, and faces with four equivalent Tb(1)Fe12Ge8 hexagonal bipyramids. There are five inequivalent Ge sites. In the first Ge site, Ge(3) is bonded in a 8-coordinate geometry to two equivalent Tb(1), two equivalent Fe(1), and four equivalent Fe(3) atoms. In the second Ge site, Ge(4) is bonded in a 6-coordinate geometry to two equivalent Fe(1) and four equivalent Fe(2) atoms. In the third Ge site, Ge(5) is bonded in a 9-coordinate geometry to three equivalent Tb(1), two equivalent Fe(1), and four equivalent Fe(2) atoms. In the fourth Ge site, Ge(1) is bonded in a 8-coordinate geometry to one Tb(1), two equivalent Fe(1), two equivalent Fe(2), two equivalent Fe(3), and one Ge(1) atom. In the fifth Ge site, Ge(2) is bonded in a 7-coordinate geometry to one Tb(1), two equivalent Fe(1), and four equivalent Fe(3) atoms. is represented by the CIF card [CIF]
data_Tb(FeGe)6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.750
_cell_length_b   9.750
_cell_length_c   5.131
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   130.102
_symmetry_Int_Tables_number   1
_cell_volume   373.092
_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  0.128  0.872  0.250  1.0
  Tb  Tb1  1  0.872  0.128  0.750  1.0
  Fe  Fe2  1  0.125  0.375  0.250  1.0
  Fe  Fe3  1  0.875  0.625  0.750  1.0
  Fe  Fe4  1  0.750  0.750  0.500  1.0
  Fe  Fe5  1  0.250  0.250  0.000  1.0
  Fe  Fe6  1  0.250  0.250  0.500  1.0
  Fe  Fe7  1  0.750  0.750  0.000  1.0
  Fe  Fe8  1  0.000  0.500  0.500  1.0
  Fe  Fe9  1  0.000  0.500  0.000  1.0
  Fe  Fe10  1  0.500  0.000  0.500  1.0
  Fe  Fe11  1  0.500  0.000  0.000  1.0
  Fe  Fe12  1  0.375  0.125  0.750  1.0
  Fe  Fe13  1  0.625  0.875  0.250  1.0
  Ge  Ge14  1  0.777  0.528  0.250  1.0
  Ge  Ge15  1  0.223  0.472  0.750  1.0
  Ge  Ge16  1  0.705  0.295  0.750  1.0
  Ge  Ge17  1  0.295  0.705  0.250  1.0
  Ge  Ge18  1  0.211  0.789  0.750  1.0
  Ge  Ge19  1  0.789  0.211  0.250  1.0
  Ge  Ge20  1  0.540  0.460  0.750  1.0
  Ge  Ge21  1  0.460  0.540  0.250  1.0
  Ge  Ge22  1  0.042  0.958  0.750  1.0
  Ge  Ge23  1  0.958  0.042  0.250  1.0
  Ge  Ge24  1  0.472  0.223  0.250  1.0
  Ge  Ge25  1  0.528  0.777  0.750  1.0
[/CIF]
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The material described by TbFe6Ge6 crystallizes in the orthorhombic Cmcm space group. Tb(1) is bonded to four equivalent Fe(1), four equivalent Fe(2), four equivalent Fe(3), one Ge(2), two equivalent Ge(1), two equivalent Ge(3), and three equivalent Ge(5) atoms to form distorted TbFe12Ge8 hexagonal bipyramids that share corners with four equivalent Tb(1)Fe12Ge8 hexagonal bipyramids, faces with eight equivalent Fe(1)Tb2Fe4Ge6 cuboctahedra, faces with eight equivalent Fe(3)Tb2Fe4Ge6 cuboctahedra, and faces with four equivalent Tb(1)Fe12Ge8 hexagonal bipyramids. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent Tb(1), two equivalent Fe(2), two equivalent Fe(3), one Ge(2), one Ge(3), one Ge(4), one Ge(5), and two equivalent Ge(1) atoms to form distorted FeTb2Fe4Ge6 cuboctahedra that share corners with four equivalent Fe(3)Tb2Fe4Ge6 cuboctahedra, corners with six equivalent Fe(1)Tb2Fe4Ge6 cuboctahedra, edges with two equivalent Fe(3)Tb2Fe4Ge6 cuboctahedra, edges with three equivalent Fe(1)Tb2Fe4Ge6 cuboctahedra,  a faceface with one Fe(1)Tb2Fe4Ge6 cuboctahedra, faces with four equivalent Fe(3)Tb2Fe4Ge6 cuboctahedra, and faces with four equivalent Tb(1)Fe12Ge8 hexagonal bipyramids. In the second Fe site, Fe(2) is bonded in a 12-coordinate geometry to two equivalent Tb(1), two equivalent Fe(1), two equivalent Fe(2), two equivalent Ge(1), two equivalent Ge(4), and two equivalent Ge(5) atoms. In the third Fe site, Fe(3) is bonded to two equivalent Tb(1), two equivalent Fe(1), two equivalent Fe(3), two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms to form distorted FeTb2Fe4Ge6 cuboctahedra that share corners with four equivalent Fe(1)Tb2Fe4Ge6 cuboctahedra, corners with four equivalent Fe(3)Tb2Fe4Ge6 cuboctahedra, edges with two equivalent Fe(1)Tb2Fe4Ge6 cuboctahedra, edges with two equivalent Fe(3)Tb2Fe4Ge6 cuboctahedra, faces with four equivalent Fe(1)Tb2Fe4Ge6 cuboctahedra, faces with four equivalent Fe(3)Tb2Fe4Ge6 cuboctahedra, and faces with four equivalent Tb(1)Fe12Ge8 hexagonal bipyramids. There are five inequivalent Ge sites. In the first Ge site, Ge(3) is bonded in a 8-coordinate geometry to two equivalent Tb(1), two equivalent Fe(1), and four equivalent Fe(3) atoms. In the second Ge site, Ge(4) is bonded in a 6-coordinate geometry to two equivalent Fe(1) and four equivalent Fe(2) atoms. In the third Ge site, Ge(5) is bonded in a 9-coordinate geometry to three equivalent Tb(1), two equivalent Fe(1), and four equivalent Fe(2) atoms. In the fourth Ge site, Ge(1) is bonded in a 8-coordinate geometry to one Tb(1), two equivalent Fe(1), two equivalent Fe(2), two equivalent Fe(3), and one Ge(1) atom. In the fifth Ge site, Ge(2) is bonded in a 7-coordinate geometry to one Tb(1), two equivalent Fe(1), and four equivalent Fe(3) atoms. is represented by the CIF card [CIF]
data_Tb(FeGe)6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.750
_cell_length_b   9.750
_cell_length_c   5.131
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   130.102
_symmetry_Int_Tables_number   1
_cell_volume   373.092
_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  0.128  0.872  0.250  1.0
  Tb  Tb1  1  0.872  0.128  0.750  1.0
  Fe  Fe2  1  0.125  0.375  0.250  1.0
  Fe  Fe3  1  0.875  0.625  0.750  1.0
  Fe  Fe4  1  0.750  0.750  0.500  1.0
  Fe  Fe5  1  0.250  0.250  0.000  1.0
  Fe  Fe6  1  0.250  0.250  0.500  1.0
  Fe  Fe7  1  0.750  0.750  0.000  1.0
  Fe  Fe8  1  0.000  0.500  0.500  1.0
  Fe  Fe9  1  0.000  0.500  0.000  1.0
  Fe  Fe10  1  0.500  0.000  0.500  1.0
  Fe  Fe11  1  0.500  0.000  0.000  1.0
  Fe  Fe12  1  0.375  0.125  0.750  1.0
  Fe  Fe13  1  0.625  0.875  0.250  1.0
  Ge  Ge14  1  0.777  0.528  0.250  1.0
  Ge  Ge15  1  0.223  0.472  0.750  1.0
  Ge  Ge16  1  0.705  0.295  0.750  1.0
  Ge  Ge17  1  0.295  0.705  0.250  1.0
  Ge  Ge18  1  0.211  0.789  0.750  1.0
  Ge  Ge19  1  0.789  0.211  0.250  1.0
  Ge  Ge20  1  0.540  0.460  0.750  1.0
  Ge  Ge21  1  0.460  0.540  0.250  1.0
  Ge  Ge22  1  0.042  0.958  0.750  1.0
  Ge  Ge23  1  0.958  0.042  0.250  1.0
  Ge  Ge24  1  0.472  0.223  0.250  1.0
  Ge  Ge25  1  0.528  0.777  0.750  1.0
[/CIF]
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