CeRuSi2 crystallizes in the monoclinic P2_1/m space group. Ce(1) is bonded in a 11-coordinate geometry to two equivalent Ru(1), three equivalent Si(2), and six equivalent Si(1) atoms. Ru(1) is bonded in a 5-coordinate geometry to two equivalent Ce(1), one Si(1), and four equivalent Si(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to six equivalent Ce(1), one Ru(1), and two equivalent Si(1) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to three equivalent Ce(1), four equivalent Ru(1), and two equivalent Si(2) atoms.
CeRuSi2 crystallizes in the monoclinic P2_1/m space group. Ce(1) is bonded in a 11-coordinate geometry to two equivalent Ru(1), three equivalent Si(2), and six equivalent Si(1) atoms. Both Ce(1)-Ru(1) bond lengths are 3.22 Å. There is one shorter (3.01 Å) and two longer (3.14 Å) Ce(1)-Si(2) bond lengths. There are a spread of Ce(1)-Si(1) bond distances ranging from 3.13-3.29 Å. Ru(1) is bonded in a 5-coordinate geometry to two equivalent Ce(1), one Si(1), and four equivalent Si(2) atoms. The Ru(1)-Si(1) bond length is 2.40 Å. There are a spread of Ru(1)-Si(2) bond distances ranging from 2.36-2.43 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to six equivalent Ce(1), one Ru(1), and two equivalent Si(1) atoms. Both Si(1)-Si(1) bond lengths are 2.52 Å. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to three equivalent Ce(1), four equivalent Ru(1), and two equivalent Si(2) atoms. Both Si(2)-Si(2) bond lengths are 2.56 Å.