The compound described by Tb3(VFe8)4 crystallizes in the monoclinic Cm space group. There are three inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 20-coordinate geometry to one V(3), one V(4), one Fe(21), one Fe(26), two equivalent Fe(1), two equivalent Fe(10), two equivalent Fe(13), two equivalent Fe(15), two equivalent Fe(6), two equivalent Fe(9), and four equivalent Fe(18) atoms. In the second Tb site, Tb(2) is bonded in a 20-coordinate geometry to one V(1), one Fe(19), one Fe(22), one Fe(24), two equivalent Fe(11), two equivalent Fe(13), two equivalent Fe(14), two equivalent Fe(2), two equivalent Fe(4), two equivalent Fe(7), and four equivalent Fe(16) atoms. In the third Tb site, Tb(3) is bonded in a 20-coordinate geometry to one V(2), one Fe(20), one Fe(23), one Fe(25), two equivalent Fe(12), two equivalent Fe(14), two equivalent Fe(15), two equivalent Fe(3), two equivalent Fe(5), two equivalent Fe(8), and four equivalent Fe(17) atoms. There are four inequivalent V sites. In the first V site, V(1) is bonded in a 14-coordinate geometry to one Tb(2), one V(4), one Fe(10), one Fe(7), two equivalent Fe(13), two equivalent Fe(16), two equivalent Fe(21), two equivalent Fe(24), and two equivalent Fe(4) atoms. In the second V site, V(2) is bonded in a 14-coordinate geometry to one Tb(3), one Fe(11), one Fe(19), one Fe(8), two equivalent Fe(14), two equivalent Fe(17), two equivalent Fe(22), two equivalent Fe(25), and two equivalent Fe(5) atoms. In the third V site, V(3) is bonded in a 14-coordinate geometry to one Tb(1), one Fe(12), one Fe(20), one Fe(9), two equivalent Fe(15), two equivalent Fe(18), two equivalent Fe(23), two equivalent Fe(26), and two equivalent Fe(6) atoms. In the fourth V site, V(4) is bonded in a 14-coordinate geometry to one Tb(1), one V(1), one Fe(10), one Fe(7), two equivalent Fe(1), two equivalent Fe(13), two equivalent Fe(18), two equivalent Fe(21), and two equivalent Fe(24) atoms. There are twenty-six inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 12-coordinate geometry to two equivalent Tb(1), two equivalent V(4), one Fe(10), one Fe(21), one Fe(24), one Fe(9), two equivalent Fe(13), and two equivalent Fe(18) atoms. In the second Fe site, Fe(2) is bonded to two equivalent Tb(2), one Fe(11), one Fe(22), one Fe(25), one Fe(7), two equivalent Fe(14), two equivalent Fe(16), and two equivalent Fe(19) atoms to form distorted FeTb2Fe10 cuboctahedra that share corners with two equivalent Fe(13)Tb2V2Fe8 cuboctahedra, corners with two equivalent Fe(14)Tb2VFe9 cuboctahedra, corners with two equivalent Fe(16)Tb2VFe9 cuboctahedra, corners with two equivalent Fe(17)Tb2VFe9 cuboctahedra, edges with two equivalent Fe(2)Tb2Fe10 cuboctahedra, edges with two equivalent Fe(13)Tb2V2Fe8 cuboctahedra, edges with two equivalent Fe(16)Tb2VFe9 cuboctahedra, faces with four equivalent Fe(14)Tb2VFe9 cuboctahedra, and faces with four equivalent Fe(16)Tb2VFe9 cuboctahedra. In the third Fe site, Fe(3) is bonded to two equivalent Tb(3), one Fe(12), one Fe(23), one Fe(26), one Fe(8), two equivalent Fe(15), two equivalent Fe(17), and two equivalent Fe(20) atoms to form distorted FeTb2Fe10 cuboctahedra that share corners with two equivalent Fe(18)Tb2V2Fe8 cuboctahedra, corners with two equivalent Fe(14)Tb2VFe9 cuboctahedra, corners with two equivalent Fe(15)Tb2VFe9 cuboctahedra, corners with two equivalent Fe(17)Tb2VFe9 cuboctahedra, edges with two equivalent Fe(3)Tb2Fe10 cuboctahedra, edges with two equivalent Fe(14)Tb2VFe9 cuboctahedra, edges with two equivalent Fe(17)Tb2VFe9 cuboctahedra, faces with four equivalent Fe(15)Tb2VFe9 cuboctahedra, and faces with four equivalent Fe(17)Tb2VFe9 cuboctahedra. In the fourth Fe site, Fe(4) is bonded in a 12-coordinate geometry to two equivalent Tb(2), two equivalent V(1), one Fe(11), one Fe(21), one Fe(24), one Fe(7), two equivalent Fe(13), and two equivalent Fe(16) atoms. In the fifth Fe site, Fe(5) is bonded in a 12-coordinate geometry to two equivalent Tb(3), two equivalent V(2), one Fe(12), one Fe(22), one Fe(25), one Fe(8), two equivalent Fe(14), and two equivalent Fe(17) atoms. In the sixth Fe site, Fe(6) is bonded in a 12-coordinate geometry to two equivalent Tb(1), two equivalent V(3), one Fe(10), one Fe(23), one Fe(26), one Fe(9), two equivalent Fe(15), and two equivalent Fe(18) atoms. In the seventh Fe site, Fe(7) is bonded in a 12-coordinate geometry to two equivalent Tb(2), one V(1), one V(4), one Fe(2), one Fe(4), two equivalent Fe(13), two equivalent Fe(16), and two equivalent Fe(24) atoms. In the eighth Fe site, Fe(8) is bonded in a 12-coordinate geometry to two equivalent Tb(3), one V(2), one Fe(19), one Fe(3), one Fe(5), two equivalent Fe(14), two equivalent Fe(17), and two equivalent Fe(25) atoms. In the ninth Fe site, Fe(9) is bonded in a 12-coordinate geometry to two equivalent Tb(1), one V(3), one Fe(1), one Fe(20), one Fe(6), two equivalent Fe(15), two equivalent Fe(18), and two equivalent Fe(26) atoms. In the tenth Fe site, Fe(10) is bonded in a 12-coordinate geometry to two equivalent Tb(1), one V(1), one V(4), one Fe(1), one Fe(6), two equivalent Fe(13), two equivalent Fe(18), and two equivalent Fe(21) atoms. In the eleventh Fe site, Fe(11) is bonded in a 12-coordinate geometry to two equivalent Tb(2), one V(2), one Fe(19), one Fe(2), one Fe(4), two equivalent Fe(14), two equivalent Fe(16), and two equivalent Fe(22) atoms. In the twelfth Fe site, Fe(12) is bonded in a 12-coordinate geometry to two equivalent Tb(3), one V(3), one Fe(20), one Fe(3), one Fe(5), two equivalent Fe(15), two equivalent Fe(17), and two equivalent Fe(23) atoms. In the thirteenth Fe site, Fe(13) is bonded to one Tb(1), one Tb(2), one V(1), one V(4), one Fe(1), one Fe(10), one Fe(21), one Fe(24), one Fe(4), one Fe(7), and two equivalent Fe(13) atoms to form distorted FeTb2V2Fe8 cuboctahedra that share  a cornercorner with one Fe(2)Tb2Fe10 cuboctahedra, corners with two equivalent Fe(13)Tb2V2Fe8 cuboctahedra, corners with two equivalent Fe(18)Tb2V2Fe8 cuboctahedra, corners with two equivalent Fe(14)Tb2VFe9 cuboctahedra, corners with two equivalent Fe(15)Tb2VFe9 cuboctahedra, corners with two equivalent Fe(16)Tb2VFe9 cuboctahedra,  an edgeedge with one Fe(2)Tb2Fe10 cuboctahedra, edges with two equivalent Fe(18)Tb2V2Fe8 cuboctahedra, edges with two equivalent Fe(16)Tb2VFe9 cuboctahedra, faces with two equivalent Fe(13)Tb2V2Fe8 cuboctahedra, faces with two equivalent Fe(18)Tb2V2Fe8 cuboctahedra, and faces with two equivalent Fe(16)Tb2VFe9 cuboctahedra. In the fourteenth Fe site, Fe(14) is bonded to one Tb(2), one Tb(3), one V(2), one Fe(11), one Fe(19), one Fe(2), one Fe(22), one Fe(25), one Fe(5), one Fe(8), and two equivalent Fe(14) atoms to form distorted FeTb2VFe9 cuboctahedra that share  a cornercorner with one Fe(2)Tb2Fe10 cuboctahedra,  a cornercorner with one Fe(3)Tb2Fe10 cuboctahedra, corners with two equivalent Fe(13)Tb2V2Fe8 cuboctahedra, corners with two equivalent Fe(14)Tb2VFe9 cuboctahedra, corners with two equivalent Fe(15)Tb2VFe9 cuboctahedra, corners with two equivalent Fe(16)Tb2VFe9 cuboctahedra, corners with two equivalent Fe(17)Tb2VFe9 cuboctahedra,  an edgeedge with one Fe(3)Tb2Fe10 cuboctahedra, edges with two equivalent Fe(16)Tb2VFe9 cuboctahedra, edges with two equivalent Fe(17)Tb2VFe9 cuboctahedra, faces with two equivalent Fe(2)Tb2Fe10 cuboctahedra, faces with two equivalent Fe(14)Tb2VFe9 cuboctahedra, faces with two equivalent Fe(16)Tb2VFe9 cuboctahedra, and faces with two equivalent Fe(17)Tb2VFe9 cuboctahedra. In the fifteenth Fe site, Fe(15) is bonded to one Tb(1), one Tb(3), one V(3), one Fe(12), one Fe(20), one Fe(23), one Fe(26), one Fe(3), one Fe(6), one Fe(9), and two equivalent Fe(15) atoms to form FeTb2VFe9 cuboctahedra that share  a cornercorner with one Fe(3)Tb2Fe10 cuboctahedra, corners with two equivalent Fe(13)Tb2V2Fe8 cuboctahedra, corners with two equivalent Fe(18)Tb2V2Fe8 cuboctahedra, corners with two equivalent Fe(14)Tb2VFe9 cuboctahedra, corners with two equivalent Fe(15)Tb2VFe9 cuboctahedra, corners with two equivalent Fe(17)Tb2VFe9 cuboctahedra, edges with two equivalent Fe(18)Tb2V2Fe8 cuboctahedra, edges with two equivalent Fe(17)Tb2VFe9 cuboctahedra, faces with two equivalent Fe(3)Tb2Fe10 cuboctahedra, faces with two equivalent Fe(18)Tb2V2Fe8 cuboctahedra, faces with two equivalent Fe(15)Tb2VFe9 cuboctahedra, and faces with two equivalent Fe(17)Tb2VFe9 cuboctahedra. In the sixteenth Fe site, Fe(16) is bonded to two equivalent Tb(2), one V(1), one Fe(11), one Fe(19), one Fe(2), one Fe(22), one Fe(24), one Fe(4), one Fe(7), and two equivalent Fe(16) atoms to form distorted FeTb2VFe9 cuboctahedra that share  a cornercorner with one Fe(2)Tb2Fe10 cuboctahedra, corners with two equivalent Fe(13)Tb2V2Fe8 cuboctahedra, corners with two equivalent Fe(14)Tb2VFe9 cuboctahedra, corners with six equivalent Fe(16)Tb2VFe9 cuboctahedra,  an edgeedge with one Fe(2)Tb2Fe10 cuboctahedra, edges with two equivalent Fe(13)Tb2V2Fe8 cuboctahedra, edges with two equivalent Fe(14)Tb2VFe9 cuboctahedra, faces with two equivalent Fe(2)Tb2Fe10 cuboctahedra, faces with two equivalent Fe(13)Tb2V2Fe8 cuboctahedra, faces with two equivalent Fe(14)Tb2VFe9 cuboctahedra, and faces with two equivalent Fe(16)Tb2VFe9 cuboctahedra. In the seventeenth Fe site, Fe(17) is bonded to two equivalent Tb(3), one V(2), one Fe(12), one Fe(20), one Fe(23), one Fe(25), one Fe(3), one Fe(5), one Fe(8), and two equivalent Fe(17) atoms to form distorted FeTb2VFe9 cuboctahedra that share  a cornercorner with one Fe(2)Tb2Fe10 cuboctahedra,  a cornercorner with one Fe(3)Tb2Fe10 cuboctahedra, corners with two equivalent Fe(14)Tb2VFe9 cuboctahedra, corners with two equivalent Fe(15)Tb2VFe9 cuboctahedra, corners with six equivalent Fe(17)Tb2VFe9 cuboctahedra,  an edgeedge with one Fe(3)Tb2Fe10 cuboctahedra, edges with two equivalent Fe(14)Tb2VFe9 cuboctahedra, edges with two equivalent Fe(15)Tb2VFe9 cuboctahedra, faces with two equivalent Fe(3)Tb2Fe10 cuboctahedra, faces with two equivalent Fe(14)Tb2VFe9 cuboctahedra, faces with two equivalent Fe(15)Tb2VFe9 cuboctahedra, and faces with two equivalent Fe(17)Tb2VFe9 cuboctahedra. In the eighteenth Fe site, Fe(18) is bonded to two equivalent Tb(1), one V(3), one V(4), one Fe(1), one Fe(10), one Fe(21), one Fe(26), one Fe(6), one Fe(9), and two equivalent Fe(18) atoms to form distorted FeTb2V2Fe8 cuboctahedra that share  a cornercorner with one Fe(3)Tb2Fe10 cuboctahedra, corners with two equivalent Fe(13)Tb2V2Fe8 cuboctahedra, corners with two equivalent Fe(15)Tb2VFe9 cuboctahedra, corners with six equivalent Fe(18)Tb2V2Fe8 cuboctahedra, edges with two equivalent Fe(13)Tb2V2Fe8 cuboctahedra, edges with two equivalent Fe(15)Tb2VFe9 cuboctahedra, faces with two equivalent Fe(13)Tb2V2Fe8 cuboctahedra, faces with two equivalent Fe(18)Tb2V2Fe8 cuboctahedra, and faces with two equivalent Fe(15)Tb2VFe9 cuboctahedra. In the nineteenth Fe site, Fe(19) is bonded in a distorted single-bond geometry to one Tb(2), one V(2), one Fe(11), one Fe(8), two equivalent Fe(14), two equivalent Fe(16), two equivalent Fe(2), two equivalent Fe(22), and two equivalent Fe(25) atoms. In the twentieth Fe site, Fe(20) is bonded in a distorted single-bond geometry to one Tb(3), one V(3), one Fe(12), one Fe(9), two equivalent Fe(15), two equivalent Fe(17), two equivalent Fe(23), two equivalent Fe(26), and two equivalent Fe(3) atoms. In the twenty-first Fe site, Fe(21) is bonded in a 14-coordinate geometry to one Tb(1), two equivalent V(1), two equivalent V(4), one Fe(1), one Fe(24), one Fe(4), two equivalent Fe(10), two equivalent Fe(13), and two equivalent Fe(18) atoms. In the twenty-second Fe site, Fe(22) is bonded in a 14-coordinate geometry to one Tb(2), two equivalent V(2), one Fe(2), one Fe(25), one Fe(5), two equivalent Fe(11), two equivalent Fe(14), two equivalent Fe(16), and two equivalent Fe(19) atoms. In the twenty-third Fe site, Fe(23) is bonded in a 14-coordinate geometry to one Tb(3), two equivalent V(3), one Fe(26), one Fe(3), one Fe(6), two equivalent Fe(12), two equivalent Fe(15), two equivalent Fe(17), and two equivalent Fe(20) atoms. In the twenty-fourth Fe site, Fe(24) is bonded in a 14-coordinate geometry to one Tb(2), two equivalent V(1), two equivalent V(4), one Fe(1), one Fe(21), one Fe(4), two equivalent Fe(13), two equivalent Fe(16), and two equivalent Fe(7) atoms. In the twenty-fifth Fe site, Fe(25) is bonded in a 14-coordinate geometry to one Tb(3), two equivalent V(2), one Fe(2), one Fe(22), one Fe(5), two equivalent Fe(14), two equivalent Fe(17), two equivalent Fe(19), and two equivalent Fe(8) atoms. In the twenty-sixth Fe site, Fe(26) is bonded in a 14-coordinate geometry to one Tb(1), two equivalent V(3), one Fe(23), one Fe(3), one Fe(6), two equivalent Fe(15), two equivalent Fe(18), two equivalent Fe(20), and two equivalent Fe(9) atoms. is represented by the CIF file [CIF]
data_Tb3(VFe8)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.665
_cell_length_b   6.432
_cell_length_c   18.117
_cell_angle_alpha   92.912
_cell_angle_beta   82.603
_cell_angle_gamma   111.263
_symmetry_Int_Tables_number   1
_cell_volume   502.425
_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  1.000  1.000  0.000  1.0
  Tb  Tb1  1  0.330  0.994  0.335  1.0
  Tb  Tb2  1  0.663  0.995  0.668  1.0
  V  V3  1  0.572  0.358  0.213  1.0
  V  V4  1  0.913  0.370  0.543  1.0
  V  V5  1  0.247  0.370  0.876  1.0
  V  V6  1  0.761  0.641  0.120  1.0
  Fe  Fe7  1  0.349  0.773  0.076  1.0
  Fe  Fe8  1  0.681  0.772  0.410  1.0
  Fe  Fe9  1  0.014  0.770  0.743  1.0
  Fe  Fe10  1  0.985  0.228  0.257  1.0
  Fe  Fe11  1  0.319  0.229  0.590  1.0
  Fe  Fe12  1  0.652  0.228  0.924  1.0
  Fe  Fe13  1  0.759  0.775  0.258  1.0
  Fe  Fe14  1  0.092  0.776  0.592  1.0
  Fe  Fe15  1  0.425  0.775  0.925  1.0
  Fe  Fe16  1  0.575  0.225  0.075  1.0
  Fe  Fe17  1  0.909  0.225  0.408  1.0
  Fe  Fe18  1  0.242  0.226  0.741  1.0
  Fe  Fe19  1  0.167  0.000  0.167  1.0
  Fe  Fe20  1  0.500  0.999  0.500  1.0
  Fe  Fe21  1  0.832  0.999  0.834  1.0
  Fe  Fe22  1  0.666  0.000  0.167  1.0
  Fe  Fe23  1  0.999  0.999  0.500  1.0
  Fe  Fe24  1  0.333  0.999  0.834  1.0
  Fe  Fe25  1  0.334  0.500  0.333  1.0
  Fe  Fe26  1  0.666  0.499  0.667  1.0
  Fe  Fe27  1  0.999  0.499  0.000  1.0
  Fe  Fe28  1  0.833  0.500  0.333  1.0
  Fe  Fe29  1  0.166  0.499  0.667  1.0
  Fe  Fe30  1  0.500  0.499  0.000  1.0
  Fe  Fe31  1  0.091  0.637  0.455  1.0
  Fe  Fe32  1  0.424  0.636  0.788  1.0
  Fe  Fe33  1  0.120  0.359  0.120  1.0
  Fe  Fe34  1  0.454  0.360  0.453  1.0
  Fe  Fe35  1  0.787  0.360  0.786  1.0
  Fe  Fe36  1  0.214  0.642  0.213  1.0
  Fe  Fe37  1  0.548  0.642  0.547  1.0
  Fe  Fe38  1  0.880  0.641  0.880  1.0
[/CIF]
.
The compound described by Tb3(VFe8)4 crystallizes in the monoclinic Cm space group. There are three inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 20-coordinate geometry to one V(3), one V(4), one Fe(21), one Fe(26), two equivalent Fe(1), two equivalent Fe(10), two equivalent Fe(13), two equivalent Fe(15), two equivalent Fe(6), two equivalent Fe(9), and four equivalent Fe(18) atoms. In the second Tb site, Tb(2) is bonded in a 20-coordinate geometry to one V(1), one Fe(19), one Fe(22), one Fe(24), two equivalent Fe(11), two equivalent Fe(13), two equivalent Fe(14), two equivalent Fe(2), two equivalent Fe(4), two equivalent Fe(7), and four equivalent Fe(16) atoms. In the third Tb site, Tb(3) is bonded in a 20-coordinate geometry to one V(2), one Fe(20), one Fe(23), one Fe(25), two equivalent Fe(12), two equivalent Fe(14), two equivalent Fe(15), two equivalent Fe(3), two equivalent Fe(5), two equivalent Fe(8), and four equivalent Fe(17) atoms. There are four inequivalent V sites. In the first V site, V(1) is bonded in a 14-coordinate geometry to one Tb(2), one V(4), one Fe(10), one Fe(7), two equivalent Fe(13), two equivalent Fe(16), two equivalent Fe(21), two equivalent Fe(24), and two equivalent Fe(4) atoms. In the second V site, V(2) is bonded in a 14-coordinate geometry to one Tb(3), one Fe(11), one Fe(19), one Fe(8), two equivalent Fe(14), two equivalent Fe(17), two equivalent Fe(22), two equivalent Fe(25), and two equivalent Fe(5) atoms. In the third V site, V(3) is bonded in a 14-coordinate geometry to one Tb(1), one Fe(12), one Fe(20), one Fe(9), two equivalent Fe(15), two equivalent Fe(18), two equivalent Fe(23), two equivalent Fe(26), and two equivalent Fe(6) atoms. In the fourth V site, V(4) is bonded in a 14-coordinate geometry to one Tb(1), one V(1), one Fe(10), one Fe(7), two equivalent Fe(1), two equivalent Fe(13), two equivalent Fe(18), two equivalent Fe(21), and two equivalent Fe(24) atoms. There are twenty-six inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 12-coordinate geometry to two equivalent Tb(1), two equivalent V(4), one Fe(10), one Fe(21), one Fe(24), one Fe(9), two equivalent Fe(13), and two equivalent Fe(18) atoms. In the second Fe site, Fe(2) is bonded to two equivalent Tb(2), one Fe(11), one Fe(22), one Fe(25), one Fe(7), two equivalent Fe(14), two equivalent Fe(16), and two equivalent Fe(19) atoms to form distorted FeTb2Fe10 cuboctahedra that share corners with two equivalent Fe(13)Tb2V2Fe8 cuboctahedra, corners with two equivalent Fe(14)Tb2VFe9 cuboctahedra, corners with two equivalent Fe(16)Tb2VFe9 cuboctahedra, corners with two equivalent Fe(17)Tb2VFe9 cuboctahedra, edges with two equivalent Fe(2)Tb2Fe10 cuboctahedra, edges with two equivalent Fe(13)Tb2V2Fe8 cuboctahedra, edges with two equivalent Fe(16)Tb2VFe9 cuboctahedra, faces with four equivalent Fe(14)Tb2VFe9 cuboctahedra, and faces with four equivalent Fe(16)Tb2VFe9 cuboctahedra. In the third Fe site, Fe(3) is bonded to two equivalent Tb(3), one Fe(12), one Fe(23), one Fe(26), one Fe(8), two equivalent Fe(15), two equivalent Fe(17), and two equivalent Fe(20) atoms to form distorted FeTb2Fe10 cuboctahedra that share corners with two equivalent Fe(18)Tb2V2Fe8 cuboctahedra, corners with two equivalent Fe(14)Tb2VFe9 cuboctahedra, corners with two equivalent Fe(15)Tb2VFe9 cuboctahedra, corners with two equivalent Fe(17)Tb2VFe9 cuboctahedra, edges with two equivalent Fe(3)Tb2Fe10 cuboctahedra, edges with two equivalent Fe(14)Tb2VFe9 cuboctahedra, edges with two equivalent Fe(17)Tb2VFe9 cuboctahedra, faces with four equivalent Fe(15)Tb2VFe9 cuboctahedra, and faces with four equivalent Fe(17)Tb2VFe9 cuboctahedra. In the fourth Fe site, Fe(4) is bonded in a 12-coordinate geometry to two equivalent Tb(2), two equivalent V(1), one Fe(11), one Fe(21), one Fe(24), one Fe(7), two equivalent Fe(13), and two equivalent Fe(16) atoms. In the fifth Fe site, Fe(5) is bonded in a 12-coordinate geometry to two equivalent Tb(3), two equivalent V(2), one Fe(12), one Fe(22), one Fe(25), one Fe(8), two equivalent Fe(14), and two equivalent Fe(17) atoms. In the sixth Fe site, Fe(6) is bonded in a 12-coordinate geometry to two equivalent Tb(1), two equivalent V(3), one Fe(10), one Fe(23), one Fe(26), one Fe(9), two equivalent Fe(15), and two equivalent Fe(18) atoms. In the seventh Fe site, Fe(7) is bonded in a 12-coordinate geometry to two equivalent Tb(2), one V(1), one V(4), one Fe(2), one Fe(4), two equivalent Fe(13), two equivalent Fe(16), and two equivalent Fe(24) atoms. In the eighth Fe site, Fe(8) is bonded in a 12-coordinate geometry to two equivalent Tb(3), one V(2), one Fe(19), one Fe(3), one Fe(5), two equivalent Fe(14), two equivalent Fe(17), and two equivalent Fe(25) atoms. In the ninth Fe site, Fe(9) is bonded in a 12-coordinate geometry to two equivalent Tb(1), one V(3), one Fe(1), one Fe(20), one Fe(6), two equivalent Fe(15), two equivalent Fe(18), and two equivalent Fe(26) atoms. In the tenth Fe site, Fe(10) is bonded in a 12-coordinate geometry to two equivalent Tb(1), one V(1), one V(4), one Fe(1), one Fe(6), two equivalent Fe(13), two equivalent Fe(18), and two equivalent Fe(21) atoms. In the eleventh Fe site, Fe(11) is bonded in a 12-coordinate geometry to two equivalent Tb(2), one V(2), one Fe(19), one Fe(2), one Fe(4), two equivalent Fe(14), two equivalent Fe(16), and two equivalent Fe(22) atoms. In the twelfth Fe site, Fe(12) is bonded in a 12-coordinate geometry to two equivalent Tb(3), one V(3), one Fe(20), one Fe(3), one Fe(5), two equivalent Fe(15), two equivalent Fe(17), and two equivalent Fe(23) atoms. In the thirteenth Fe site, Fe(13) is bonded to one Tb(1), one Tb(2), one V(1), one V(4), one Fe(1), one Fe(10), one Fe(21), one Fe(24), one Fe(4), one Fe(7), and two equivalent Fe(13) atoms to form distorted FeTb2V2Fe8 cuboctahedra that share  a cornercorner with one Fe(2)Tb2Fe10 cuboctahedra, corners with two equivalent Fe(13)Tb2V2Fe8 cuboctahedra, corners with two equivalent Fe(18)Tb2V2Fe8 cuboctahedra, corners with two equivalent Fe(14)Tb2VFe9 cuboctahedra, corners with two equivalent Fe(15)Tb2VFe9 cuboctahedra, corners with two equivalent Fe(16)Tb2VFe9 cuboctahedra,  an edgeedge with one Fe(2)Tb2Fe10 cuboctahedra, edges with two equivalent Fe(18)Tb2V2Fe8 cuboctahedra, edges with two equivalent Fe(16)Tb2VFe9 cuboctahedra, faces with two equivalent Fe(13)Tb2V2Fe8 cuboctahedra, faces with two equivalent Fe(18)Tb2V2Fe8 cuboctahedra, and faces with two equivalent Fe(16)Tb2VFe9 cuboctahedra. In the fourteenth Fe site, Fe(14) is bonded to one Tb(2), one Tb(3), one V(2), one Fe(11), one Fe(19), one Fe(2), one Fe(22), one Fe(25), one Fe(5), one Fe(8), and two equivalent Fe(14) atoms to form distorted FeTb2VFe9 cuboctahedra that share  a cornercorner with one Fe(2)Tb2Fe10 cuboctahedra,  a cornercorner with one Fe(3)Tb2Fe10 cuboctahedra, corners with two equivalent Fe(13)Tb2V2Fe8 cuboctahedra, corners with two equivalent Fe(14)Tb2VFe9 cuboctahedra, corners with two equivalent Fe(15)Tb2VFe9 cuboctahedra, corners with two equivalent Fe(16)Tb2VFe9 cuboctahedra, corners with two equivalent Fe(17)Tb2VFe9 cuboctahedra,  an edgeedge with one Fe(3)Tb2Fe10 cuboctahedra, edges with two equivalent Fe(16)Tb2VFe9 cuboctahedra, edges with two equivalent Fe(17)Tb2VFe9 cuboctahedra, faces with two equivalent Fe(2)Tb2Fe10 cuboctahedra, faces with two equivalent Fe(14)Tb2VFe9 cuboctahedra, faces with two equivalent Fe(16)Tb2VFe9 cuboctahedra, and faces with two equivalent Fe(17)Tb2VFe9 cuboctahedra. In the fifteenth Fe site, Fe(15) is bonded to one Tb(1), one Tb(3), one V(3), one Fe(12), one Fe(20), one Fe(23), one Fe(26), one Fe(3), one Fe(6), one Fe(9), and two equivalent Fe(15) atoms to form FeTb2VFe9 cuboctahedra that share  a cornercorner with one Fe(3)Tb2Fe10 cuboctahedra, corners with two equivalent Fe(13)Tb2V2Fe8 cuboctahedra, corners with two equivalent Fe(18)Tb2V2Fe8 cuboctahedra, corners with two equivalent Fe(14)Tb2VFe9 cuboctahedra, corners with two equivalent Fe(15)Tb2VFe9 cuboctahedra, corners with two equivalent Fe(17)Tb2VFe9 cuboctahedra, edges with two equivalent Fe(18)Tb2V2Fe8 cuboctahedra, edges with two equivalent Fe(17)Tb2VFe9 cuboctahedra, faces with two equivalent Fe(3)Tb2Fe10 cuboctahedra, faces with two equivalent Fe(18)Tb2V2Fe8 cuboctahedra, faces with two equivalent Fe(15)Tb2VFe9 cuboctahedra, and faces with two equivalent Fe(17)Tb2VFe9 cuboctahedra. In the sixteenth Fe site, Fe(16) is bonded to two equivalent Tb(2), one V(1), one Fe(11), one Fe(19), one Fe(2), one Fe(22), one Fe(24), one Fe(4), one Fe(7), and two equivalent Fe(16) atoms to form distorted FeTb2VFe9 cuboctahedra that share  a cornercorner with one Fe(2)Tb2Fe10 cuboctahedra, corners with two equivalent Fe(13)Tb2V2Fe8 cuboctahedra, corners with two equivalent Fe(14)Tb2VFe9 cuboctahedra, corners with six equivalent Fe(16)Tb2VFe9 cuboctahedra,  an edgeedge with one Fe(2)Tb2Fe10 cuboctahedra, edges with two equivalent Fe(13)Tb2V2Fe8 cuboctahedra, edges with two equivalent Fe(14)Tb2VFe9 cuboctahedra, faces with two equivalent Fe(2)Tb2Fe10 cuboctahedra, faces with two equivalent Fe(13)Tb2V2Fe8 cuboctahedra, faces with two equivalent Fe(14)Tb2VFe9 cuboctahedra, and faces with two equivalent Fe(16)Tb2VFe9 cuboctahedra. In the seventeenth Fe site, Fe(17) is bonded to two equivalent Tb(3), one V(2), one Fe(12), one Fe(20), one Fe(23), one Fe(25), one Fe(3), one Fe(5), one Fe(8), and two equivalent Fe(17) atoms to form distorted FeTb2VFe9 cuboctahedra that share  a cornercorner with one Fe(2)Tb2Fe10 cuboctahedra,  a cornercorner with one Fe(3)Tb2Fe10 cuboctahedra, corners with two equivalent Fe(14)Tb2VFe9 cuboctahedra, corners with two equivalent Fe(15)Tb2VFe9 cuboctahedra, corners with six equivalent Fe(17)Tb2VFe9 cuboctahedra,  an edgeedge with one Fe(3)Tb2Fe10 cuboctahedra, edges with two equivalent Fe(14)Tb2VFe9 cuboctahedra, edges with two equivalent Fe(15)Tb2VFe9 cuboctahedra, faces with two equivalent Fe(3)Tb2Fe10 cuboctahedra, faces with two equivalent Fe(14)Tb2VFe9 cuboctahedra, faces with two equivalent Fe(15)Tb2VFe9 cuboctahedra, and faces with two equivalent Fe(17)Tb2VFe9 cuboctahedra. In the eighteenth Fe site, Fe(18) is bonded to two equivalent Tb(1), one V(3), one V(4), one Fe(1), one Fe(10), one Fe(21), one Fe(26), one Fe(6), one Fe(9), and two equivalent Fe(18) atoms to form distorted FeTb2V2Fe8 cuboctahedra that share  a cornercorner with one Fe(3)Tb2Fe10 cuboctahedra, corners with two equivalent Fe(13)Tb2V2Fe8 cuboctahedra, corners with two equivalent Fe(15)Tb2VFe9 cuboctahedra, corners with six equivalent Fe(18)Tb2V2Fe8 cuboctahedra, edges with two equivalent Fe(13)Tb2V2Fe8 cuboctahedra, edges with two equivalent Fe(15)Tb2VFe9 cuboctahedra, faces with two equivalent Fe(13)Tb2V2Fe8 cuboctahedra, faces with two equivalent Fe(18)Tb2V2Fe8 cuboctahedra, and faces with two equivalent Fe(15)Tb2VFe9 cuboctahedra. In the nineteenth Fe site, Fe(19) is bonded in a distorted single-bond geometry to one Tb(2), one V(2), one Fe(11), one Fe(8), two equivalent Fe(14), two equivalent Fe(16), two equivalent Fe(2), two equivalent Fe(22), and two equivalent Fe(25) atoms. In the twentieth Fe site, Fe(20) is bonded in a distorted single-bond geometry to one Tb(3), one V(3), one Fe(12), one Fe(9), two equivalent Fe(15), two equivalent Fe(17), two equivalent Fe(23), two equivalent Fe(26), and two equivalent Fe(3) atoms. In the twenty-first Fe site, Fe(21) is bonded in a 14-coordinate geometry to one Tb(1), two equivalent V(1), two equivalent V(4), one Fe(1), one Fe(24), one Fe(4), two equivalent Fe(10), two equivalent Fe(13), and two equivalent Fe(18) atoms. In the twenty-second Fe site, Fe(22) is bonded in a 14-coordinate geometry to one Tb(2), two equivalent V(2), one Fe(2), one Fe(25), one Fe(5), two equivalent Fe(11), two equivalent Fe(14), two equivalent Fe(16), and two equivalent Fe(19) atoms. In the twenty-third Fe site, Fe(23) is bonded in a 14-coordinate geometry to one Tb(3), two equivalent V(3), one Fe(26), one Fe(3), one Fe(6), two equivalent Fe(12), two equivalent Fe(15), two equivalent Fe(17), and two equivalent Fe(20) atoms. In the twenty-fourth Fe site, Fe(24) is bonded in a 14-coordinate geometry to one Tb(2), two equivalent V(1), two equivalent V(4), one Fe(1), one Fe(21), one Fe(4), two equivalent Fe(13), two equivalent Fe(16), and two equivalent Fe(7) atoms. In the twenty-fifth Fe site, Fe(25) is bonded in a 14-coordinate geometry to one Tb(3), two equivalent V(2), one Fe(2), one Fe(22), one Fe(5), two equivalent Fe(14), two equivalent Fe(17), two equivalent Fe(19), and two equivalent Fe(8) atoms. In the twenty-sixth Fe site, Fe(26) is bonded in a 14-coordinate geometry to one Tb(1), two equivalent V(3), one Fe(23), one Fe(3), one Fe(6), two equivalent Fe(15), two equivalent Fe(18), two equivalent Fe(20), and two equivalent Fe(9) atoms. is represented by the CIF file [CIF]
data_Tb3(VFe8)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.665
_cell_length_b   6.432
_cell_length_c   18.117
_cell_angle_alpha   92.912
_cell_angle_beta   82.603
_cell_angle_gamma   111.263
_symmetry_Int_Tables_number   1
_cell_volume   502.425
_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  1.000  1.000  0.000  1.0
  Tb  Tb1  1  0.330  0.994  0.335  1.0
  Tb  Tb2  1  0.663  0.995  0.668  1.0
  V  V3  1  0.572  0.358  0.213  1.0
  V  V4  1  0.913  0.370  0.543  1.0
  V  V5  1  0.247  0.370  0.876  1.0
  V  V6  1  0.761  0.641  0.120  1.0
  Fe  Fe7  1  0.349  0.773  0.076  1.0
  Fe  Fe8  1  0.681  0.772  0.410  1.0
  Fe  Fe9  1  0.014  0.770  0.743  1.0
  Fe  Fe10  1  0.985  0.228  0.257  1.0
  Fe  Fe11  1  0.319  0.229  0.590  1.0
  Fe  Fe12  1  0.652  0.228  0.924  1.0
  Fe  Fe13  1  0.759  0.775  0.258  1.0
  Fe  Fe14  1  0.092  0.776  0.592  1.0
  Fe  Fe15  1  0.425  0.775  0.925  1.0
  Fe  Fe16  1  0.575  0.225  0.075  1.0
  Fe  Fe17  1  0.909  0.225  0.408  1.0
  Fe  Fe18  1  0.242  0.226  0.741  1.0
  Fe  Fe19  1  0.167  0.000  0.167  1.0
  Fe  Fe20  1  0.500  0.999  0.500  1.0
  Fe  Fe21  1  0.832  0.999  0.834  1.0
  Fe  Fe22  1  0.666  0.000  0.167  1.0
  Fe  Fe23  1  0.999  0.999  0.500  1.0
  Fe  Fe24  1  0.333  0.999  0.834  1.0
  Fe  Fe25  1  0.334  0.500  0.333  1.0
  Fe  Fe26  1  0.666  0.499  0.667  1.0
  Fe  Fe27  1  0.999  0.499  0.000  1.0
  Fe  Fe28  1  0.833  0.500  0.333  1.0
  Fe  Fe29  1  0.166  0.499  0.667  1.0
  Fe  Fe30  1  0.500  0.499  0.000  1.0
  Fe  Fe31  1  0.091  0.637  0.455  1.0
  Fe  Fe32  1  0.424  0.636  0.788  1.0
  Fe  Fe33  1  0.120  0.359  0.120  1.0
  Fe  Fe34  1  0.454  0.360  0.453  1.0
  Fe  Fe35  1  0.787  0.360  0.786  1.0
  Fe  Fe36  1  0.214  0.642  0.213  1.0
  Fe  Fe37  1  0.548  0.642  0.547  1.0
  Fe  Fe38  1  0.880  0.641  0.880  1.0
[/CIF]
.