Tm(CrAl)6 crystallizes in the orthorhombic Immm space group. Tm(1) is bonded in a 20-coordinate geometry to four equivalent Cr(2), eight equivalent Cr(1), two equivalent Al(1), two equivalent Al(2), and four equivalent Al(3) atoms. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to two equivalent Tm(1), two equivalent Cr(1), two equivalent Cr(2), two equivalent Al(1), two equivalent Al(2), and two equivalent Al(3) atoms to form a mixture of distorted edge, face, and corner-sharing CrTm2Al6Cr4 cuboctahedra. In the second Cr site, Cr(2) is bonded to two equivalent Tm(1), four equivalent Cr(1), two equivalent Al(1), two equivalent Al(2), and two equivalent Al(3) atoms to form a mixture of distorted edge, face, and corner-sharing CrTm2Al6Cr4 cuboctahedra. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a 10-coordinate geometry to one Tm(1), two equivalent Cr(2), four equivalent Cr(1), one Al(1), and two equivalent Al(3) atoms. In the second Al site, Al(2) is bonded in a 7-coordinate geometry to one Tm(1), two equivalent Cr(2), four equivalent Cr(1), and two equivalent Al(3) atoms. In the third Al site, Al(3) is bonded in a 12-coordinate geometry to two equivalent Tm(1), two equivalent Cr(2), four equivalent Cr(1), two equivalent Al(1), and two equivalent Al(2) atoms.
Tm(CrAl)6 crystallizes in the orthorhombic Immm space group. Tm(1) is bonded in a 20-coordinate geometry to four equivalent Cr(2), eight equivalent Cr(1), two equivalent Al(1), two equivalent Al(2), and four equivalent Al(3) atoms. All Tm(1)-Cr(2) bond lengths are 3.29 Å. All Tm(1)-Cr(1) bond lengths are 3.34 Å. Both Tm(1)-Al(1) bond lengths are 3.00 Å. Both Tm(1)-Al(2) bond lengths are 2.93 Å. All Tm(1)-Al(3) bond lengths are 3.03 Å. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to two equivalent Tm(1), two equivalent Cr(1), two equivalent Cr(2), two equivalent Al(1), two equivalent Al(2), and two equivalent Al(3) atoms to form a mixture of distorted edge, face, and corner-sharing CrTm2Al6Cr4 cuboctahedra. Both Cr(1)-Cr(1) bond lengths are 2.53 Å. Both Cr(1)-Cr(2) bond lengths are 2.51 Å. Both Cr(1)-Al(1) bond lengths are 2.67 Å. Both Cr(1)-Al(2) bond lengths are 2.61 Å. Both Cr(1)-Al(3) bond lengths are 2.59 Å. In the second Cr site, Cr(2) is bonded to two equivalent Tm(1), four equivalent Cr(1), two equivalent Al(1), two equivalent Al(2), and two equivalent Al(3) atoms to form a mixture of distorted edge, face, and corner-sharing CrTm2Al6Cr4 cuboctahedra. Both Cr(2)-Al(1) bond lengths are 2.66 Å. Both Cr(2)-Al(2) bond lengths are 2.65 Å. Both Cr(2)-Al(3) bond lengths are 2.69 Å. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a 10-coordinate geometry to one Tm(1), two equivalent Cr(2), four equivalent Cr(1), one Al(1), and two equivalent Al(3) atoms. The Al(1)-Al(1) bond length is 2.68 Å. Both Al(1)-Al(3) bond lengths are 2.85 Å. In the second Al site, Al(2) is bonded in a 7-coordinate geometry to one Tm(1), two equivalent Cr(2), four equivalent Cr(1), and two equivalent Al(3) atoms. Both Al(2)-Al(3) bond lengths are 3.05 Å. In the third Al site, Al(3) is bonded in a 12-coordinate geometry to two equivalent Tm(1), two equivalent Cr(2), four equivalent Cr(1), two equivalent Al(1), and two equivalent Al(2) atoms.