SmRu2SiC crystallizes in the orthorhombic Cmcm space group. Sm(1) is bonded in a 4-coordinate geometry to three equivalent Si(1) and four equivalent C(1) atoms. Ru(1) is bonded in a 4-coordinate geometry to three equivalent Si(1) and one C(1) atom. Si(1) is bonded in a 9-coordinate geometry to three equivalent Sm(1) and six equivalent Ru(1) atoms. C(1) is bonded to four equivalent Sm(1) and two equivalent Ru(1) atoms to form a mixture of corner and edge-sharing CSm4Ru2 octahedra. The corner-sharing octahedral tilt angles are 23°.
SmRu2SiC crystallizes in the orthorhombic Cmcm space group. Sm(1) is bonded in a 4-coordinate geometry to three equivalent Si(1) and four equivalent C(1) atoms. There is one shorter (3.10 Å) and two longer (3.14 Å) Sm(1)-Si(1) bond lengths. All Sm(1)-C(1) bond lengths are 2.70 Å. Ru(1) is bonded in a 4-coordinate geometry to three equivalent Si(1) and one C(1) atom. There are two shorter (2.50 Å) and one longer (2.51 Å) Ru(1)-Si(1) bond length. The Ru(1)-C(1) bond length is 1.88 Å. Si(1) is bonded in a 9-coordinate geometry to three equivalent Sm(1) and six equivalent Ru(1) atoms. C(1) is bonded to four equivalent Sm(1) and two equivalent Ru(1) atoms to form a mixture of corner and edge-sharing CSm4Ru2 octahedra. The corner-sharing octahedral tilt angles are 23°.