GdNi3Al9 crystallizes in the trigonal R32 space group. There are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 17-coordinate geometry to six equivalent Ni(1), one Al(1), one Al(6), three equivalent Al(2), and six equivalent Al(4) atoms. In the second Gd site, Gd(1) is bonded in a 17-coordinate geometry to six equivalent Ni(1), one Al(1), one Al(6), three equivalent Al(2), and six equivalent Al(4) atoms. Ni(1) is bonded in a 8-coordinate geometry to two Gd(1,1); one Al(1); one Al(2); one Al(3); one Al(5); one Al(6); and three equivalent Al(4) atoms. There are six inequivalent Al sites. In the first Al site, Al(1) is bonded in a distorted trigonal non-coplanar geometry to one Gd(1), three equivalent Ni(1), one Al(1), three equivalent Al(3), and three equivalent Al(4) atoms. In the second Al site, Al(2) is bonded in a 10-coordinate geometry to two Gd(1,1); two equivalent Ni(1); two equivalent Al(2); and four equivalent Al(4) atoms. In the third Al site, Al(3) is bonded in a linear geometry to two equivalent Ni(1), two equivalent Al(1), two equivalent Al(5), and two equivalent Al(6) atoms. In the fourth Al site, Al(4) is bonded in a 3-coordinate geometry to two Gd(1,1); three equivalent Ni(1); one Al(1); one Al(5); one Al(6); and two equivalent Al(2) atoms. In the fifth Al site, Al(5) is bonded in a distorted trigonal non-coplanar geometry to three equivalent Ni(1), one Al(6), three equivalent Al(3), and three equivalent Al(4) atoms. In the sixth Al site, Al(6) is bonded in a distorted trigonal non-coplanar geometry to one Gd(1), three equivalent Ni(1), one Al(5), three equivalent Al(3), and three equivalent Al(4) atoms.
GdNi3Al9 crystallizes in the trigonal R32 space group. There are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 17-coordinate geometry to six equivalent Ni(1), one Al(1), one Al(6), three equivalent Al(2), and six equivalent Al(4) atoms. There are three shorter (3.27 Å) and three longer (3.28 Å) Gd(1)-Ni(1) bond lengths. The Gd(1)-Al(1) bond length is 3.14 Å. The Gd(1)-Al(6) bond length is 3.14 Å. All Gd(1)-Al(2) bond lengths are 2.98 Å. All Gd(1)-Al(4) bond lengths are 3.06 Å. In the second Gd site, Gd(1) is bonded in a 17-coordinate geometry to six equivalent Ni(1), one Al(1), one Al(6), three equivalent Al(2), and six equivalent Al(4) atoms. There are three shorter (3.27 Å) and three longer (3.28 Å) Gd(1)-Ni(1) bond lengths. The Gd(1)-Al(1) bond length is 3.14 Å. The Gd(1)-Al(6) bond length is 3.14 Å. All Gd(1)-Al(2) bond lengths are 2.98 Å. All Gd(1)-Al(4) bond lengths are 3.06 Å. Ni(1) is bonded in a 8-coordinate geometry to two Gd(1,1); one Al(1); one Al(2); one Al(3); one Al(5); one Al(6); and three equivalent Al(4) atoms. The Ni(1)-Al(1) bond length is 2.56 Å. The Ni(1)-Al(2) bond length is 2.43 Å. The Ni(1)-Al(3) bond length is 2.31 Å. The Ni(1)-Al(5) bond length is 2.60 Å. The Ni(1)-Al(6) bond length is 2.56 Å. There is one shorter (2.43 Å) and two longer (2.45 Å) Ni(1)-Al(4) bond lengths. There are six inequivalent Al sites. In the first Al site, Al(1) is bonded in a distorted trigonal non-coplanar geometry to one Gd(1), three equivalent Ni(1), one Al(1), three equivalent Al(3), and three equivalent Al(4) atoms. The Al(1)-Al(1) bond length is 2.83 Å. All Al(1)-Al(3) bond lengths are 2.80 Å. All Al(1)-Al(4) bond lengths are 2.75 Å. In the second Al site, Al(2) is bonded in a 10-coordinate geometry to two Gd(1,1); two equivalent Ni(1); two equivalent Al(2); and four equivalent Al(4) atoms. Both Al(2)-Al(2) bond lengths are 2.61 Å. All Al(2)-Al(4) bond lengths are 2.79 Å. In the third Al site, Al(3) is bonded in a linear geometry to two equivalent Ni(1), two equivalent Al(1), two equivalent Al(5), and two equivalent Al(6) atoms. Both Al(3)-Al(5) bond lengths are 2.82 Å. Both Al(3)-Al(6) bond lengths are 2.79 Å. In the fourth Al site, Al(4) is bonded in a 3-coordinate geometry to two Gd(1,1); three equivalent Ni(1); one Al(1); one Al(5); one Al(6); and two equivalent Al(2) atoms. The Al(4)-Al(5) bond length is 2.68 Å. The Al(4)-Al(6) bond length is 2.75 Å. In the fifth Al site, Al(5) is bonded in a distorted trigonal non-coplanar geometry to three equivalent Ni(1), one Al(6), three equivalent Al(3), and three equivalent Al(4) atoms. The Al(5)-Al(6) bond length is 2.86 Å. In the sixth Al site, Al(6) is bonded in a distorted trigonal non-coplanar geometry to one Gd(1), three equivalent Ni(1), one Al(5), three equivalent Al(3), and three equivalent Al(4) atoms.