Tb(MnAl)6 crystallizes in the orthorhombic Immm space group. Tb(1) is bonded in a 20-coordinate geometry to four equivalent Mn(2), eight equivalent Mn(1), two equivalent Al(1), two equivalent Al(2), and four equivalent Al(3) atoms. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent Tb(1), two equivalent Mn(1), two equivalent Mn(2), two equivalent Al(1), two equivalent Al(2), and two equivalent Al(3) atoms to form a mixture of distorted face, corner, and edge-sharing MnTb2Mn4Al6 cuboctahedra. In the second Mn site, Mn(2) is bonded to two equivalent Tb(1), four equivalent Mn(1), two equivalent Al(1), two equivalent Al(2), and two equivalent Al(3) atoms to form a mixture of distorted face, corner, and edge-sharing MnTb2Mn4Al6 cuboctahedra. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a 10-coordinate geometry to one Tb(1), two equivalent Mn(2), four equivalent Mn(1), one Al(1), and two equivalent Al(3) atoms. In the second Al site, Al(2) is bonded in a 8-coordinate geometry to one Tb(1), two equivalent Mn(2), four equivalent Mn(1), one Al(2), and two equivalent Al(3) atoms. In the third Al site, Al(3) is bonded in a 12-coordinate geometry to two equivalent Tb(1), two equivalent Mn(2), four equivalent Mn(1), two equivalent Al(1), and two equivalent Al(2) atoms.
Tb(MnAl)6 crystallizes in the orthorhombic Immm space group. Tb(1) is bonded in a 20-coordinate geometry to four equivalent Mn(2), eight equivalent Mn(1), two equivalent Al(1), two equivalent Al(2), and four equivalent Al(3) atoms. All Tb(1)-Mn(2) bond lengths are 3.19 Å. All Tb(1)-Mn(1) bond lengths are 3.32 Å. Both Tb(1)-Al(1) bond lengths are 3.06 Å. Both Tb(1)-Al(2) bond lengths are 2.91 Å. All Tb(1)-Al(3) bond lengths are 3.01 Å. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent Tb(1), two equivalent Mn(1), two equivalent Mn(2), two equivalent Al(1), two equivalent Al(2), and two equivalent Al(3) atoms to form a mixture of distorted face, corner, and edge-sharing MnTb2Mn4Al6 cuboctahedra. Both Mn(1)-Mn(1) bond lengths are 2.46 Å. Both Mn(1)-Mn(2) bond lengths are 2.53 Å. Both Mn(1)-Al(1) bond lengths are 2.62 Å. Both Mn(1)-Al(2) bond lengths are 2.64 Å. Both Mn(1)-Al(3) bond lengths are 2.52 Å. In the second Mn site, Mn(2) is bonded to two equivalent Tb(1), four equivalent Mn(1), two equivalent Al(1), two equivalent Al(2), and two equivalent Al(3) atoms to form a mixture of distorted face, corner, and edge-sharing MnTb2Mn4Al6 cuboctahedra. Both Mn(2)-Al(1) bond lengths are 2.64 Å. Both Mn(2)-Al(2) bond lengths are 2.61 Å. Both Mn(2)-Al(3) bond lengths are 2.67 Å. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a 10-coordinate geometry to one Tb(1), two equivalent Mn(2), four equivalent Mn(1), one Al(1), and two equivalent Al(3) atoms. The Al(1)-Al(1) bond length is 2.70 Å. Both Al(1)-Al(3) bond lengths are 2.79 Å. In the second Al site, Al(2) is bonded in a 8-coordinate geometry to one Tb(1), two equivalent Mn(2), four equivalent Mn(1), one Al(2), and two equivalent Al(3) atoms. The Al(2)-Al(2) bond length is 2.77 Å. Both Al(2)-Al(3) bond lengths are 3.01 Å. In the third Al site, Al(3) is bonded in a 12-coordinate geometry to two equivalent Tb(1), two equivalent Mn(2), four equivalent Mn(1), two equivalent Al(1), and two equivalent Al(2) atoms.