Ce5Ru3Al2 crystallizes in the trigonal R3 space group. There are four inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 2-coordinate geometry to two equivalent Ru(1), two equivalent Ru(2), one Al(2), and three equivalent Al(1) atoms. In the second Ce site, Ce(2) is bonded to one Ru(2), two equivalent Ru(1), and one Al(1) atom to form distorted corner-sharing CeAlRu3 tetrahedra. In the third Ce site, Ce(3) is bonded in a 8-coordinate geometry to two equivalent Ru(1), two equivalent Ru(2), one Al(2), and three equivalent Al(1) atoms. In the fourth Ce site, Ce(4) is bonded to three equivalent Ru(2) and one Al(2) atom to form distorted corner-sharing CeAlRu3 tetrahedra. There are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded in a 8-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), two equivalent Ce(3), one Al(1), and one Al(2) atom. In the second Ru site, Ru(2) is bonded in a 8-coordinate geometry to one Ce(2), one Ce(4), two equivalent Ce(1), two equivalent Ce(3), and two equivalent Al(1) atoms. There are two inequivalent Al sites. In the first Al site, Al(2) is bonded in a 10-coordinate geometry to one Ce(4), three equivalent Ce(1), three equivalent Ce(3), and three equivalent Ru(1) atoms. In the second Al site, Al(1) is bonded in a 10-coordinate geometry to one Ce(2), three equivalent Ce(1), three equivalent Ce(3), one Ru(1), and two equivalent Ru(2) atoms.
Ce5Ru3Al2 crystallizes in the trigonal R3 space group. There are four inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 2-coordinate geometry to two equivalent Ru(1), two equivalent Ru(2), one Al(2), and three equivalent Al(1) atoms. There is one shorter (2.68 Å) and one longer (3.33 Å) Ce(1)-Ru(1) bond length. There is one shorter (2.73 Å) and one longer (3.36 Å) Ce(1)-Ru(2) bond length. The Ce(1)-Al(2) bond length is 3.24 Å. There are a spread of Ce(1)-Al(1) bond distances ranging from 3.21-3.26 Å. In the second Ce site, Ce(2) is bonded to one Ru(2), two equivalent Ru(1), and one Al(1) atom to form distorted corner-sharing CeAlRu3 tetrahedra. The Ce(2)-Ru(2) bond length is 2.88 Å. There is one shorter (2.81 Å) and one longer (2.87 Å) Ce(2)-Ru(1) bond length. The Ce(2)-Al(1) bond length is 3.21 Å. In the third Ce site, Ce(3) is bonded in a 8-coordinate geometry to two equivalent Ru(1), two equivalent Ru(2), one Al(2), and three equivalent Al(1) atoms. There is one shorter (2.89 Å) and one longer (3.27 Å) Ce(3)-Ru(1) bond length. There is one shorter (2.80 Å) and one longer (3.24 Å) Ce(3)-Ru(2) bond length. The Ce(3)-Al(2) bond length is 3.29 Å. There is one shorter (3.21 Å) and two longer (3.23 Å) Ce(3)-Al(1) bond lengths. In the fourth Ce site, Ce(4) is bonded to three equivalent Ru(2) and one Al(2) atom to form distorted corner-sharing CeAlRu3 tetrahedra. All Ce(4)-Ru(2) bond lengths are 2.79 Å. The Ce(4)-Al(2) bond length is 3.21 Å. There are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded in a 8-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), two equivalent Ce(3), one Al(1), and one Al(2) atom. The Ru(1)-Al(1) bond length is 2.63 Å. The Ru(1)-Al(2) bond length is 2.63 Å. In the second Ru site, Ru(2) is bonded in a 8-coordinate geometry to one Ce(2), one Ce(4), two equivalent Ce(1), two equivalent Ce(3), and two equivalent Al(1) atoms. There is one shorter (2.62 Å) and one longer (2.63 Å) Ru(2)-Al(1) bond length. There are two inequivalent Al sites. In the first Al site, Al(2) is bonded in a 10-coordinate geometry to one Ce(4), three equivalent Ce(1), three equivalent Ce(3), and three equivalent Ru(1) atoms. In the second Al site, Al(1) is bonded in a 10-coordinate geometry to one Ce(2), three equivalent Ce(1), three equivalent Ce(3), one Ru(1), and two equivalent Ru(2) atoms.