Ce4Ru3 crystallizes in the monoclinic C2/m space group. There are three inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 6-coordinate geometry to two equivalent Ru(2) and four equivalent Ru(1) atoms. In the second Ce site, Ce(2) is bonded in a 4-coordinate geometry to two equivalent Ru(1) and two equivalent Ru(2) atoms. In the third Ce site, Ce(3) is bonded in a 6-coordinate geometry to two equivalent Ru(2) and four equivalent Ru(1) atoms. There are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded in a 4-coordinate geometry to one Ce(2), two equivalent Ce(3), and four equivalent Ce(1) atoms. In the second Ru site, Ru(2) is bonded in a 8-coordinate geometry to two equivalent Ce(2), two equivalent Ce(3), and four equivalent Ce(1) atoms.
Ce4Ru3 crystallizes in the monoclinic C2/m space group. There are three inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 6-coordinate geometry to two equivalent Ru(2) and four equivalent Ru(1) atoms. There is one shorter (2.96 Å) and one longer (3.11 Å) Ce(1)-Ru(2) bond length. There are a spread of Ce(1)-Ru(1) bond distances ranging from 2.57-3.32 Å. In the second Ce site, Ce(2) is bonded in a 4-coordinate geometry to two equivalent Ru(1) and two equivalent Ru(2) atoms. Both Ce(2)-Ru(1) bond lengths are 2.68 Å. There is one shorter (3.08 Å) and one longer (3.17 Å) Ce(2)-Ru(2) bond length. In the third Ce site, Ce(3) is bonded in a 6-coordinate geometry to two equivalent Ru(2) and four equivalent Ru(1) atoms. Both Ce(3)-Ru(2) bond lengths are 2.63 Å. There are two shorter (2.81 Å) and two longer (2.95 Å) Ce(3)-Ru(1) bond lengths. There are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded in a 4-coordinate geometry to one Ce(2), two equivalent Ce(3), and four equivalent Ce(1) atoms. In the second Ru site, Ru(2) is bonded in a 8-coordinate geometry to two equivalent Ce(2), two equivalent Ce(3), and four equivalent Ce(1) atoms.