CrMnAl24 crystallizes in the monoclinic C2/m space group. Cr(1) is bonded in a cuboctahedral geometry to two equivalent Al(5), two equivalent Al(8), four equivalent Al(2), and four equivalent Al(3) atoms. Mn(1) is bonded in a cuboctahedral geometry to two equivalent Al(6), two equivalent Al(7), four equivalent Al(1), and four equivalent Al(4) atoms. There are eight inequivalent Al sites. In the first Al site, Al(1) is bonded in a 11-coordinate geometry to one Mn(1), one Al(3), one Al(7), one Al(8), two equivalent Al(1), two equivalent Al(6), and three equivalent Al(4) atoms. In the second Al site, Al(2) is bonded in a 11-coordinate geometry to one Cr(1), one Al(4), one Al(7), one Al(8), two equivalent Al(2), two equivalent Al(5), and three equivalent Al(3) atoms. In the third Al site, Al(3) is bonded in a 11-coordinate geometry to one Cr(1), one Al(1), one Al(3), one Al(4), one Al(7), one Al(8), two equivalent Al(5), and three equivalent Al(2) atoms. In the fourth Al site, Al(4) is bonded in a 11-coordinate geometry to one Mn(1), one Al(2), one Al(3), one Al(4), one Al(7), one Al(8), two equivalent Al(6), and three equivalent Al(1) atoms. In the fifth Al site, Al(5) is bonded in a 11-coordinate geometry to one Cr(1), one Al(7), one Al(8), four equivalent Al(2), and four equivalent Al(3) atoms. In the sixth Al site, Al(6) is bonded in a 11-coordinate geometry to one Mn(1), one Al(7), one Al(8), four equivalent Al(1), and four equivalent Al(4) atoms. In the seventh Al site, Al(7) is bonded in a 11-coordinate geometry to one Mn(1), one Al(5), one Al(6), two equivalent Al(1), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(4) atoms. In the eighth Al site, Al(8) is bonded in a 11-coordinate geometry to one Cr(1), one Al(5), one Al(6), two equivalent Al(1), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(4) atoms.
CrMnAl24 crystallizes in the monoclinic C2/m space group. Cr(1) is bonded in a cuboctahedral geometry to two equivalent Al(5), two equivalent Al(8), four equivalent Al(2), and four equivalent Al(3) atoms. Both Cr(1)-Al(5) bond lengths are 2.64 Å. Both Cr(1)-Al(8) bond lengths are 2.65 Å. All Cr(1)-Al(2) bond lengths are 2.65 Å. All Cr(1)-Al(3) bond lengths are 2.65 Å. Mn(1) is bonded in a cuboctahedral geometry to two equivalent Al(6), two equivalent Al(7), four equivalent Al(1), and four equivalent Al(4) atoms. Both Mn(1)-Al(6) bond lengths are 2.65 Å. Both Mn(1)-Al(7) bond lengths are 2.64 Å. All Mn(1)-Al(1) bond lengths are 2.64 Å. All Mn(1)-Al(4) bond lengths are 2.64 Å. There are eight inequivalent Al sites. In the first Al site, Al(1) is bonded in a 11-coordinate geometry to one Mn(1), one Al(3), one Al(7), one Al(8), two equivalent Al(1), two equivalent Al(6), and three equivalent Al(4) atoms. The Al(1)-Al(3) bond length is 2.75 Å. The Al(1)-Al(7) bond length is 2.78 Å. The Al(1)-Al(8) bond length is 2.75 Å. There is one shorter (2.74 Å) and one longer (2.91 Å) Al(1)-Al(1) bond length. There is one shorter (2.76 Å) and one longer (2.79 Å) Al(1)-Al(6) bond length. There is one shorter (2.76 Å) and two longer (2.79 Å) Al(1)-Al(4) bond lengths. In the second Al site, Al(2) is bonded in a 11-coordinate geometry to one Cr(1), one Al(4), one Al(7), one Al(8), two equivalent Al(2), two equivalent Al(5), and three equivalent Al(3) atoms. The Al(2)-Al(4) bond length is 2.75 Å. The Al(2)-Al(7) bond length is 2.76 Å. The Al(2)-Al(8) bond length is 2.79 Å. There is one shorter (2.76 Å) and one longer (2.89 Å) Al(2)-Al(2) bond length. There is one shorter (2.76 Å) and one longer (2.79 Å) Al(2)-Al(5) bond length. There are a spread of Al(2)-Al(3) bond distances ranging from 2.75-2.80 Å. In the third Al site, Al(3) is bonded in a 11-coordinate geometry to one Cr(1), one Al(1), one Al(3), one Al(4), one Al(7), one Al(8), two equivalent Al(5), and three equivalent Al(2) atoms. The Al(3)-Al(3) bond length is 2.75 Å. The Al(3)-Al(4) bond length is 2.92 Å. The Al(3)-Al(7) bond length is 2.75 Å. The Al(3)-Al(8) bond length is 2.79 Å. There is one shorter (2.75 Å) and one longer (2.79 Å) Al(3)-Al(5) bond length. In the fourth Al site, Al(4) is bonded in a 11-coordinate geometry to one Mn(1), one Al(2), one Al(3), one Al(4), one Al(7), one Al(8), two equivalent Al(6), and three equivalent Al(1) atoms. The Al(4)-Al(4) bond length is 2.74 Å. The Al(4)-Al(7) bond length is 2.79 Å. The Al(4)-Al(8) bond length is 2.75 Å. There is one shorter (2.75 Å) and one longer (2.79 Å) Al(4)-Al(6) bond length. In the fifth Al site, Al(5) is bonded in a 11-coordinate geometry to one Cr(1), one Al(7), one Al(8), four equivalent Al(2), and four equivalent Al(3) atoms. The Al(5)-Al(7) bond length is 2.91 Å. The Al(5)-Al(8) bond length is 2.76 Å. In the sixth Al site, Al(6) is bonded in a 11-coordinate geometry to one Mn(1), one Al(7), one Al(8), four equivalent Al(1), and four equivalent Al(4) atoms. The Al(6)-Al(7) bond length is 2.75 Å. The Al(6)-Al(8) bond length is 2.90 Å. In the seventh Al site, Al(7) is bonded in a 11-coordinate geometry to one Mn(1), one Al(5), one Al(6), two equivalent Al(1), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(4) atoms. In the eighth Al site, Al(8) is bonded in a 11-coordinate geometry to one Cr(1), one Al(5), one Al(6), two equivalent Al(1), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(4) atoms.