Al19Ni5Y3 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 15-coordinate geometry to two equivalent Ni(3), one Al(8), two equivalent Al(10), two equivalent Al(5), four equivalent Al(6), and four equivalent Al(7) atoms. In the second Y site, Y(2) is bonded in a 15-coordinate geometry to two equivalent Ni(1), one Al(10), one Al(2), one Al(3), one Al(7), one Al(8), two equivalent Al(4), two equivalent Al(5), two equivalent Al(6), and two equivalent Al(9) atoms. There are three inequivalent Ni sites. In the first Ni site, Ni(3) is bonded in a 7-coordinate geometry to two equivalent Y(1), one Al(8), two equivalent Al(7), and four equivalent Al(5) atoms. In the second Ni site, Ni(2) is bonded in a 9-coordinate geometry to one Al(2), one Al(7), one Al(9), two equivalent Al(1), two equivalent Al(10), and two equivalent Al(4) atoms. In the third Ni site, Ni(1) is bonded in a 8-coordinate geometry to two equivalent Y(2), one Al(1), one Al(4), one Al(9), two equivalent Al(2), and three equivalent Al(3) atoms. There are ten inequivalent Al sites. In the first Al site, Al(1) is bonded in a distorted trigonal planar geometry to one Ni(1), two equivalent Ni(2), one Al(10), and one Al(3) atom. In the second Al site, Al(2) is bonded in a distorted trigonal non-coplanar geometry to one Y(2), one Ni(2), two equivalent Ni(1), and one Al(3) atom. In the third Al site, Al(3) is bonded in a 10-coordinate geometry to one Y(2), three equivalent Ni(1), one Al(1), one Al(2), two equivalent Al(3), and two equivalent Al(9) atoms. In the fourth Al site, Al(4) is bonded in a 3-coordinate geometry to two equivalent Y(2), one Ni(1), two equivalent Ni(2), and one Al(10) atom. In the fifth Al site, Al(5) is bonded in a 2-coordinate geometry to one Y(1), two equivalent Y(2), two equivalent Ni(3), and one Al(6) atom. In the sixth Al site, Al(6) is bonded in a 12-coordinate geometry to two equivalent Y(1), two equivalent Y(2), one Al(5), one Al(6), one Al(7), one Al(9), two equivalent Al(10), and two equivalent Al(8) atoms. In the seventh Al site, Al(7) is bonded in a distorted bent 150 degrees geometry to one Y(2), two equivalent Y(1), one Ni(2), one Ni(3), one Al(6), and two equivalent Al(10) atoms. In the eighth Al site, Al(8) is bonded in a distorted single-bond geometry to one Y(1), two equivalent Y(2), one Ni(3), and four equivalent Al(6) atoms. In the ninth Al site, Al(9) is bonded in a distorted bent 150 degrees geometry to two equivalent Y(2), one Ni(1), one Ni(2), one Al(6), two equivalent Al(10), and two equivalent Al(3) atoms. In the tenth Al site, Al(10) is bonded to one Y(1), one Y(2), two equivalent Ni(2), one Al(1), one Al(4), two equivalent Al(6), two equivalent Al(7), and two equivalent Al(9) atoms to form a mixture of distorted corner and face-sharing AlY2Al8Ni2 cuboctahedra.
Al19Ni5Y3 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 15-coordinate geometry to two equivalent Ni(3), one Al(8), two equivalent Al(10), two equivalent Al(5), four equivalent Al(6), and four equivalent Al(7) atoms. Both Y(1)-Ni(3) bond lengths are 3.26 Å. The Y(1)-Al(8) bond length is 3.11 Å. Both Y(1)-Al(10) bond lengths are 3.13 Å. Both Y(1)-Al(5) bond lengths are 3.35 Å. All Y(1)-Al(6) bond lengths are 3.13 Å. All Y(1)-Al(7) bond lengths are 3.17 Å. In the second Y site, Y(2) is bonded in a 15-coordinate geometry to two equivalent Ni(1), one Al(10), one Al(2), one Al(3), one Al(7), one Al(8), two equivalent Al(4), two equivalent Al(5), two equivalent Al(6), and two equivalent Al(9) atoms. Both Y(2)-Ni(1) bond lengths are 3.27 Å. The Y(2)-Al(10) bond length is 3.28 Å. The Y(2)-Al(2) bond length is 3.26 Å. The Y(2)-Al(3) bond length is 3.09 Å. The Y(2)-Al(7) bond length is 3.41 Å. The Y(2)-Al(8) bond length is 3.16 Å. Both Y(2)-Al(4) bond lengths are 3.08 Å. Both Y(2)-Al(5) bond lengths are 3.08 Å. Both Y(2)-Al(6) bond lengths are 3.14 Å. Both Y(2)-Al(9) bond lengths are 3.14 Å. There are three inequivalent Ni sites. In the first Ni site, Ni(3) is bonded in a 7-coordinate geometry to two equivalent Y(1), one Al(8), two equivalent Al(7), and four equivalent Al(5) atoms. The Ni(3)-Al(8) bond length is 2.39 Å. Both Ni(3)-Al(7) bond lengths are 2.44 Å. All Ni(3)-Al(5) bond lengths are 2.50 Å. In the second Ni site, Ni(2) is bonded in a 9-coordinate geometry to one Al(2), one Al(7), one Al(9), two equivalent Al(1), two equivalent Al(10), and two equivalent Al(4) atoms. The Ni(2)-Al(2) bond length is 2.43 Å. The Ni(2)-Al(7) bond length is 2.46 Å. The Ni(2)-Al(9) bond length is 2.50 Å. Both Ni(2)-Al(1) bond lengths are 2.52 Å. Both Ni(2)-Al(10) bond lengths are 2.76 Å. Both Ni(2)-Al(4) bond lengths are 2.56 Å. In the third Ni site, Ni(1) is bonded in a 8-coordinate geometry to two equivalent Y(2), one Al(1), one Al(4), one Al(9), two equivalent Al(2), and three equivalent Al(3) atoms. The Ni(1)-Al(1) bond length is 2.38 Å. The Ni(1)-Al(4) bond length is 2.54 Å. The Ni(1)-Al(9) bond length is 2.47 Å. Both Ni(1)-Al(2) bond lengths are 2.55 Å. There are two shorter (2.42 Å) and one longer (2.59 Å) Ni(1)-Al(3) bond length. There are ten inequivalent Al sites. In the first Al site, Al(1) is bonded in a distorted trigonal planar geometry to one Ni(1), two equivalent Ni(2), one Al(10), and one Al(3) atom. The Al(1)-Al(10) bond length is 2.76 Å. The Al(1)-Al(3) bond length is 2.77 Å. In the second Al site, Al(2) is bonded in a distorted trigonal non-coplanar geometry to one Y(2), one Ni(2), two equivalent Ni(1), and one Al(3) atom. The Al(2)-Al(3) bond length is 2.70 Å. In the third Al site, Al(3) is bonded in a 10-coordinate geometry to one Y(2), three equivalent Ni(1), one Al(1), one Al(2), two equivalent Al(3), and two equivalent Al(9) atoms. Both Al(3)-Al(3) bond lengths are 2.64 Å. Both Al(3)-Al(9) bond lengths are 2.76 Å. In the fourth Al site, Al(4) is bonded in a 3-coordinate geometry to two equivalent Y(2), one Ni(1), two equivalent Ni(2), and one Al(10) atom. The Al(4)-Al(10) bond length is 2.82 Å. In the fifth Al site, Al(5) is bonded in a 2-coordinate geometry to one Y(1), two equivalent Y(2), two equivalent Ni(3), and one Al(6) atom. The Al(5)-Al(6) bond length is 3.17 Å. In the sixth Al site, Al(6) is bonded in a 12-coordinate geometry to two equivalent Y(1), two equivalent Y(2), one Al(5), one Al(6), one Al(7), one Al(9), two equivalent Al(10), and two equivalent Al(8) atoms. The Al(6)-Al(6) bond length is 3.09 Å. The Al(6)-Al(7) bond length is 3.06 Å. The Al(6)-Al(9) bond length is 2.88 Å. Both Al(6)-Al(10) bond lengths are 3.00 Å. Both Al(6)-Al(8) bond lengths are 2.89 Å. In the seventh Al site, Al(7) is bonded in a distorted bent 150 degrees geometry to one Y(2), two equivalent Y(1), one Ni(2), one Ni(3), one Al(6), and two equivalent Al(10) atoms. Both Al(7)-Al(10) bond lengths are 2.76 Å. In the eighth Al site, Al(8) is bonded in a distorted single-bond geometry to one Y(1), two equivalent Y(2), one Ni(3), and four equivalent Al(6) atoms. In the ninth Al site, Al(9) is bonded in a distorted bent 150 degrees geometry to two equivalent Y(2), one Ni(1), one Ni(2), one Al(6), two equivalent Al(10), and two equivalent Al(3) atoms. Both Al(9)-Al(10) bond lengths are 2.75 Å. In the tenth Al site, Al(10) is bonded to one Y(1), one Y(2), two equivalent Ni(2), one Al(1), one Al(4), two equivalent Al(6), two equivalent Al(7), and two equivalent Al(9) atoms to form a mixture of distorted corner and face-sharing AlY2Al8Ni2 cuboctahedra.