Tb(VFe2)4 crystallizes in the tetragonal I4/mmm space group. Tb(1) is bonded in a 20-coordinate geometry to four equivalent V(1), eight equivalent Fe(1), and eight equivalent Fe(2) atoms. V(1) is bonded in a 10-coordinate geometry to one Tb(1), one V(1), four equivalent Fe(1), and four equivalent Fe(2) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent Tb(1), four equivalent V(1), two equivalent Fe(1), and four equivalent Fe(2) atoms to form a mixture of distorted corner, edge, and face-sharing FeTb2V4Fe6 cuboctahedra. In the second Fe site, Fe(2) is bonded in a 12-coordinate geometry to two equivalent Tb(1), four equivalent V(1), two equivalent Fe(2), and four equivalent Fe(1) atoms.
Tb(VFe2)4 crystallizes in the tetragonal I4/mmm space group. Tb(1) is bonded in a 20-coordinate geometry to four equivalent V(1), eight equivalent Fe(1), and eight equivalent Fe(2) atoms. All Tb(1)-V(1) bond lengths are 3.03 Å. All Tb(1)-Fe(1) bond lengths are 3.23 Å. All Tb(1)-Fe(2) bond lengths are 3.05 Å. V(1) is bonded in a 10-coordinate geometry to one Tb(1), one V(1), four equivalent Fe(1), and four equivalent Fe(2) atoms. The V(1)-V(1) bond length is 2.44 Å. All V(1)-Fe(1) bond lengths are 2.59 Å. There are two shorter (2.60 Å) and two longer (2.62 Å) V(1)-Fe(2) bond lengths. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent Tb(1), four equivalent V(1), two equivalent Fe(1), and four equivalent Fe(2) atoms to form a mixture of distorted corner, edge, and face-sharing FeTb2V4Fe6 cuboctahedra. Both Fe(1)-Fe(1) bond lengths are 2.36 Å. All Fe(1)-Fe(2) bond lengths are 2.44 Å. In the second Fe site, Fe(2) is bonded in a 12-coordinate geometry to two equivalent Tb(1), four equivalent V(1), two equivalent Fe(2), and four equivalent Fe(1) atoms. Both Fe(2)-Fe(2) bond lengths are 2.73 Å.