TbFe10Cr2 crystallizes in the orthorhombic Immm space group. Tb(1) is bonded in a 20-coordinate geometry to two equivalent Cr(1), two equivalent Fe(4), four equivalent Fe(1), four equivalent Fe(2), and eight equivalent Fe(3) atoms. Cr(1) is bonded in a 14-coordinate geometry to one Tb(1), one Cr(1), two equivalent Fe(1), two equivalent Fe(2), four equivalent Fe(3), and four equivalent Fe(4) atoms. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 12-coordinate geometry to two equivalent Tb(1), two equivalent Cr(1), two equivalent Fe(2), two equivalent Fe(4), and four equivalent Fe(3) atoms. In the second Fe site, Fe(2) is bonded in a 12-coordinate geometry to two equivalent Tb(1), two equivalent Cr(1), two equivalent Fe(1), two equivalent Fe(4), and four equivalent Fe(3) atoms. In the third Fe site, Fe(3) is bonded to two equivalent Tb(1), two equivalent Cr(1), two equivalent Fe(1), two equivalent Fe(2), two equivalent Fe(3), and two equivalent Fe(4) atoms to form a mixture of edge, corner, and face-sharing FeTb2Cr2Fe8 cuboctahedra. In the fourth Fe site, Fe(4) is bonded in a 14-coordinate geometry to one Tb(1), four equivalent Cr(1), one Fe(4), two equivalent Fe(1), two equivalent Fe(2), and four equivalent Fe(3) atoms.
TbFe10Cr2 crystallizes in the orthorhombic Immm space group. Tb(1) is bonded in a 20-coordinate geometry to two equivalent Cr(1), two equivalent Fe(4), four equivalent Fe(1), four equivalent Fe(2), and eight equivalent Fe(3) atoms. Both Tb(1)-Cr(1) bond lengths are 3.11 Å. Both Tb(1)-Fe(4) bond lengths are 3.01 Å. All Tb(1)-Fe(1) bond lengths are 3.01 Å. All Tb(1)-Fe(2) bond lengths are 3.03 Å. All Tb(1)-Fe(3) bond lengths are 3.20 Å. Cr(1) is bonded in a 14-coordinate geometry to one Tb(1), one Cr(1), two equivalent Fe(1), two equivalent Fe(2), four equivalent Fe(3), and four equivalent Fe(4) atoms. The Cr(1)-Cr(1) bond length is 2.23 Å. Both Cr(1)-Fe(1) bond lengths are 2.55 Å. Both Cr(1)-Fe(2) bond lengths are 2.62 Å. All Cr(1)-Fe(3) bond lengths are 2.60 Å. All Cr(1)-Fe(4) bond lengths are 2.84 Å. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 12-coordinate geometry to two equivalent Tb(1), two equivalent Cr(1), two equivalent Fe(2), two equivalent Fe(4), and four equivalent Fe(3) atoms. Both Fe(1)-Fe(2) bond lengths are 2.70 Å. Both Fe(1)-Fe(4) bond lengths are 2.59 Å. All Fe(1)-Fe(3) bond lengths are 2.42 Å. In the second Fe site, Fe(2) is bonded in a 12-coordinate geometry to two equivalent Tb(1), two equivalent Cr(1), two equivalent Fe(1), two equivalent Fe(4), and four equivalent Fe(3) atoms. Both Fe(2)-Fe(4) bond lengths are 2.58 Å. All Fe(2)-Fe(3) bond lengths are 2.41 Å. In the third Fe site, Fe(3) is bonded to two equivalent Tb(1), two equivalent Cr(1), two equivalent Fe(1), two equivalent Fe(2), two equivalent Fe(3), and two equivalent Fe(4) atoms to form a mixture of edge, corner, and face-sharing FeTb2Cr2Fe8 cuboctahedra. Both Fe(3)-Fe(3) bond lengths are 2.34 Å. Both Fe(3)-Fe(4) bond lengths are 2.58 Å. In the fourth Fe site, Fe(4) is bonded in a 14-coordinate geometry to one Tb(1), four equivalent Cr(1), one Fe(4), two equivalent Fe(1), two equivalent Fe(2), and four equivalent Fe(3) atoms. The Fe(4)-Fe(4) bond length is 2.35 Å.