CeYCu4 crystallizes in the orthorhombic Imm2 space group. Ce(1) is bonded in a 12-coordinate geometry to six equivalent Cu(1) and six equivalent Cu(2) atoms. Y(1) is bonded in a 12-coordinate geometry to six equivalent Cu(1) and six equivalent Cu(2) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 10-coordinate geometry to three equivalent Ce(1), three equivalent Y(1), one Cu(1), and three equivalent Cu(2) atoms. In the second Cu site, Cu(2) is bonded in a 10-coordinate geometry to three equivalent Ce(1), three equivalent Y(1), one Cu(2), and three equivalent Cu(1) atoms.
CeYCu4 crystallizes in the orthorhombic Imm2 space group. Ce(1) is bonded in a 12-coordinate geometry to six equivalent Cu(1) and six equivalent Cu(2) atoms. There are two shorter (3.08 Å) and four longer (3.13 Å) Ce(1)-Cu(1) bond lengths. All Ce(1)-Cu(2) bond lengths are 2.98 Å. Y(1) is bonded in a 12-coordinate geometry to six equivalent Cu(1) and six equivalent Cu(2) atoms. There are four shorter (2.95 Å) and two longer (3.03 Å) Y(1)-Cu(1) bond lengths. There are two shorter (3.05 Å) and four longer (3.13 Å) Y(1)-Cu(2) bond lengths. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 10-coordinate geometry to three equivalent Ce(1), three equivalent Y(1), one Cu(1), and three equivalent Cu(2) atoms. The Cu(1)-Cu(1) bond length is 2.74 Å. There are two shorter (2.48 Å) and one longer (2.53 Å) Cu(1)-Cu(2) bond length. In the second Cu site, Cu(2) is bonded in a 10-coordinate geometry to three equivalent Ce(1), three equivalent Y(1), one Cu(2), and three equivalent Cu(1) atoms. The Cu(2)-Cu(2) bond length is 2.77 Å.