Tm(CrFe5)2 crystallizes in the orthorhombic Immm space group. Tm(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 Tm(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 to two equivalent Tm(1), two equivalent Cr(1), two equivalent Fe(2), two equivalent Fe(4), and four equivalent Fe(3) atoms to form a mixture of distorted face, corner, and edge-sharing FeTm2Cr2Fe8 cuboctahedra. In the second Fe site, Fe(2) is bonded to two equivalent Tm(1), two equivalent Cr(1), two equivalent Fe(1), two equivalent Fe(4), and four equivalent Fe(3) atoms to form a mixture of distorted face, corner, and edge-sharing FeTm2Cr2Fe8 cuboctahedra. In the third Fe site, Fe(3) is bonded to two equivalent Tm(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 distorted face, corner, and edge-sharing FeTm2Cr2Fe8 cuboctahedra. In the fourth Fe site, Fe(4) is bonded in a 14-coordinate geometry to one Tm(1), four equivalent Cr(1), one Fe(4), two equivalent Fe(1), two equivalent Fe(2), and four equivalent Fe(3) atoms.
Tm(CrFe5)2 crystallizes in the orthorhombic Immm space group. Tm(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 Tm(1)-Cr(1) bond lengths are 3.10 Å. Both Tm(1)-Fe(4) bond lengths are 3.00 Å. All Tm(1)-Fe(1) bond lengths are 3.00 Å. All Tm(1)-Fe(2) bond lengths are 3.02 Å. All Tm(1)-Fe(3) bond lengths are 3.19 Å. Cr(1) is bonded in a 14-coordinate geometry to one Tm(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 2.24 Å. Both Cr(1)-Fe(1) bond lengths are 2.56 Å. Both Cr(1)-Fe(2) bond lengths are 2.63 Å. All Cr(1)-Fe(3) bond lengths are 2.59 Å. All Cr(1)-Fe(4) bond lengths are 2.85 Å. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent Tm(1), two equivalent Cr(1), two equivalent Fe(2), two equivalent Fe(4), and four equivalent Fe(3) atoms to form a mixture of distorted face, corner, and edge-sharing FeTm2Cr2Fe8 cuboctahedra. Both Fe(1)-Fe(2) bond lengths are 2.68 Å. Both Fe(1)-Fe(4) bond lengths are 2.60 Å. All Fe(1)-Fe(3) bond lengths are 2.42 Å. In the second Fe site, Fe(2) is bonded to two equivalent Tm(1), two equivalent Cr(1), two equivalent Fe(1), two equivalent Fe(4), and four equivalent Fe(3) atoms to form a mixture of distorted face, corner, and edge-sharing FeTm2Cr2Fe8 cuboctahedra. Both Fe(2)-Fe(4) bond lengths are 2.59 Å. All Fe(2)-Fe(3) bond lengths are 2.41 Å. In the third Fe site, Fe(3) is bonded to two equivalent Tm(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 distorted face, corner, and edge-sharing FeTm2Cr2Fe8 cuboctahedra. Both Fe(3)-Fe(3) bond lengths are 2.35 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 Tm(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 2.36 Å.