CeNiCuSi2 crystallizes in the tetragonal I-4m2 space group. Ce(1) is bonded in a 16-coordinate geometry to four equivalent Ni(1), four equivalent Cu(1), and eight equivalent Si(1) atoms. Ni(1) is bonded to four equivalent Ce(1), four equivalent Cu(1), and four equivalent Si(1) atoms to form distorted NiCe4Cu4Si4 cuboctahedra that share corners with four equivalent Cu(1)Ce4Si4Ni4 cuboctahedra, corners with twelve equivalent Ni(1)Ce4Cu4Si4 cuboctahedra, edges with two equivalent Cu(1)Ce4Si4Ni4 cuboctahedra, faces with four equivalent Ni(1)Ce4Cu4Si4 cuboctahedra, and faces with four equivalent Cu(1)Ce4Si4Ni4 cuboctahedra. Cu(1) is bonded to four equivalent Ce(1), four equivalent Ni(1), and four equivalent Si(1) atoms to form distorted CuCe4Si4Ni4 cuboctahedra that share corners with four equivalent Ni(1)Ce4Cu4Si4 cuboctahedra, corners with twelve equivalent Cu(1)Ce4Si4Ni4 cuboctahedra, edges with two equivalent Ni(1)Ce4Cu4Si4 cuboctahedra, faces with four equivalent Ni(1)Ce4Cu4Si4 cuboctahedra, and faces with four equivalent Cu(1)Ce4Si4Ni4 cuboctahedra. Si(1) is bonded in a 9-coordinate geometry to four equivalent Ce(1), two equivalent Ni(1), two equivalent Cu(1), and one Si(1) atom.
CeNiCuSi2 crystallizes in the tetragonal I-4m2 space group. Ce(1) is bonded in a 16-coordinate geometry to four equivalent Ni(1), four equivalent Cu(1), and eight equivalent Si(1) atoms. All Ce(1)-Ni(1) bond lengths are 3.15 Å. All Ce(1)-Cu(1) bond lengths are 3.15 Å. All Ce(1)-Si(1) bond lengths are 3.11 Å. Ni(1) is bonded to four equivalent Ce(1), four equivalent Cu(1), and four equivalent Si(1) atoms to form distorted NiCe4Cu4Si4 cuboctahedra that share corners with four equivalent Cu(1)Ce4Si4Ni4 cuboctahedra, corners with twelve equivalent Ni(1)Ce4Cu4Si4 cuboctahedra, edges with two equivalent Cu(1)Ce4Si4Ni4 cuboctahedra, faces with four equivalent Ni(1)Ce4Cu4Si4 cuboctahedra, and faces with four equivalent Cu(1)Ce4Si4Ni4 cuboctahedra. All Ni(1)-Cu(1) bond lengths are 2.86 Å. All Ni(1)-Si(1) bond lengths are 2.36 Å. Cu(1) is bonded to four equivalent Ce(1), four equivalent Ni(1), and four equivalent Si(1) atoms to form distorted CuCe4Si4Ni4 cuboctahedra that share corners with four equivalent Ni(1)Ce4Cu4Si4 cuboctahedra, corners with twelve equivalent Cu(1)Ce4Si4Ni4 cuboctahedra, edges with two equivalent Ni(1)Ce4Cu4Si4 cuboctahedra, faces with four equivalent Ni(1)Ce4Cu4Si4 cuboctahedra, and faces with four equivalent Cu(1)Ce4Si4Ni4 cuboctahedra. All Cu(1)-Si(1) bond lengths are 2.36 Å. Si(1) is bonded in a 9-coordinate geometry to four equivalent Ce(1), two equivalent Ni(1), two equivalent Cu(1), and one Si(1) atom. The Si(1)-Si(1) bond length is 2.40 Å.