CeRuCuSi2 crystallizes in the tetragonal I-4m2 space group. Ce(1) is bonded in a 16-coordinate geometry to four equivalent Ru(1), four equivalent Cu(1), and eight equivalent Si(1) atoms. Ru(1) is bonded to four equivalent Ce(1), four equivalent Cu(1), and four equivalent Si(1) atoms to form distorted RuCe4Cu4Si4 cuboctahedra that share corners with four equivalent Cu(1)Ce4Si4Ru4 cuboctahedra, corners with twelve equivalent Ru(1)Ce4Cu4Si4 cuboctahedra, edges with two equivalent Cu(1)Ce4Si4Ru4 cuboctahedra, faces with four equivalent Ru(1)Ce4Cu4Si4 cuboctahedra, and faces with four equivalent Cu(1)Ce4Si4Ru4 cuboctahedra. Cu(1) is bonded to four equivalent Ce(1), four equivalent Ru(1), and four equivalent Si(1) atoms to form CuCe4Si4Ru4 cuboctahedra that share corners with four equivalent Ru(1)Ce4Cu4Si4 cuboctahedra, corners with twelve equivalent Cu(1)Ce4Si4Ru4 cuboctahedra, edges with two equivalent Ru(1)Ce4Cu4Si4 cuboctahedra, faces with four equivalent Ru(1)Ce4Cu4Si4 cuboctahedra, and faces with four equivalent Cu(1)Ce4Si4Ru4 cuboctahedra. Si(1) is bonded in a 9-coordinate geometry to four equivalent Ce(1), two equivalent Ru(1), two equivalent Cu(1), and one Si(1) atom.
CeRuCuSi2 crystallizes in the tetragonal I-4m2 space group. Ce(1) is bonded in a 16-coordinate geometry to four equivalent Ru(1), four equivalent Cu(1), and eight equivalent Si(1) atoms. All Ce(1)-Ru(1) bond lengths are 3.26 Å. All Ce(1)-Cu(1) bond lengths are 3.26 Å. All Ce(1)-Si(1) bond lengths are 3.10 Å. Ru(1) is bonded to four equivalent Ce(1), four equivalent Cu(1), and four equivalent Si(1) atoms to form distorted RuCe4Cu4Si4 cuboctahedra that share corners with four equivalent Cu(1)Ce4Si4Ru4 cuboctahedra, corners with twelve equivalent Ru(1)Ce4Cu4Si4 cuboctahedra, edges with two equivalent Cu(1)Ce4Si4Ru4 cuboctahedra, faces with four equivalent Ru(1)Ce4Cu4Si4 cuboctahedra, and faces with four equivalent Cu(1)Ce4Si4Ru4 cuboctahedra. All Ru(1)-Cu(1) bond lengths are 2.85 Å. All Ru(1)-Si(1) bond lengths are 2.42 Å. Cu(1) is bonded to four equivalent Ce(1), four equivalent Ru(1), and four equivalent Si(1) atoms to form CuCe4Si4Ru4 cuboctahedra that share corners with four equivalent Ru(1)Ce4Cu4Si4 cuboctahedra, corners with twelve equivalent Cu(1)Ce4Si4Ru4 cuboctahedra, edges with two equivalent Ru(1)Ce4Cu4Si4 cuboctahedra, faces with four equivalent Ru(1)Ce4Cu4Si4 cuboctahedra, and faces with four equivalent Cu(1)Ce4Si4Ru4 cuboctahedra. All Cu(1)-Si(1) bond lengths are 2.42 Å. Si(1) is bonded in a 9-coordinate geometry to four equivalent Ce(1), two equivalent Ru(1), two equivalent Cu(1), and one Si(1) atom. The Si(1)-Si(1) bond length is 2.44 Å.