CeCu4Sn crystallizes in the monoclinic P2_1 space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 16-coordinate geometry to one Cu(2), one Cu(8), two equivalent Cu(1), two equivalent Cu(4), three equivalent Cu(3), three equivalent Cu(5), one Sn(2), and three equivalent Sn(1) atoms. In the second Ce site, Ce(2) is bonded in a 16-coordinate geometry to one Cu(1), one Cu(4), two equivalent Cu(2), two equivalent Cu(8), three equivalent Cu(6), three equivalent Cu(7), one Sn(1), and three equivalent Sn(2) atoms. There are eight inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 8-coordinate geometry to one Ce(2), two equivalent Ce(1), one Cu(5), one Cu(6), one Cu(7), one Cu(8), one Sn(1), and one Sn(2) atom. In the second Cu site, Cu(2) is bonded in a 8-coordinate geometry to one Ce(1), two equivalent Ce(2), one Cu(3), one Cu(4), one Cu(5), one Cu(7), and two equivalent Sn(2) atoms. In the third Cu site, Cu(3) is bonded in a 10-coordinate geometry to three equivalent Ce(1), one Cu(2), one Cu(4), one Cu(8), two equivalent Cu(5), one Sn(1), and one Sn(2) atom. In the fourth Cu site, Cu(4) is bonded in a 9-coordinate geometry to one Ce(2), two equivalent Ce(1), one Cu(2), one Cu(3), one Cu(5), one Cu(6), one Sn(1), and one Sn(2) atom. In the fifth Cu site, Cu(5) is bonded in a 10-coordinate geometry to three equivalent Ce(1), one Cu(1), one Cu(2), one Cu(4), two equivalent Cu(3), and two equivalent Sn(1) atoms. In the sixth Cu site, Cu(6) is bonded in a 10-coordinate geometry to three equivalent Ce(2), one Cu(1), one Cu(4), one Cu(8), two equivalent Cu(7), one Sn(1), and one Sn(2) atom. In the seventh Cu site, Cu(7) is bonded in a 10-coordinate geometry to three equivalent Ce(2), one Cu(1), one Cu(2), one Cu(8), two equivalent Cu(6), and two equivalent Sn(2) atoms. In the eighth Cu site, Cu(8) is bonded in a 9-coordinate geometry to one Ce(1), two equivalent Ce(2), one Cu(1), one Cu(3), one Cu(6), one Cu(7), one Sn(1), and one Sn(2) atom. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 8-coordinate geometry to one Ce(2), three equivalent Ce(1), one Cu(1), one Cu(3), one Cu(4), one Cu(6), one Cu(8), and two equivalent Cu(5) atoms. In the second Sn site, Sn(2) is bonded in a 13-coordinate geometry to one Ce(1), three equivalent Ce(2), one Cu(1), one Cu(3), one Cu(4), one Cu(6), one Cu(8), two equivalent Cu(2), and two equivalent Cu(7) atoms.
CeCu4Sn crystallizes in the monoclinic P2_1 space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 16-coordinate geometry to one Cu(2), one Cu(8), two equivalent Cu(1), two equivalent Cu(4), three equivalent Cu(3), three equivalent Cu(5), one Sn(2), and three equivalent Sn(1) atoms. The Ce(1)-Cu(2) bond length is 2.93 Å. The Ce(1)-Cu(8) bond length is 3.20 Å. There is one shorter (2.91 Å) and one longer (2.97 Å) Ce(1)-Cu(1) bond length. There is one shorter (2.99 Å) and one longer (3.29 Å) Ce(1)-Cu(4) bond length. There are a spread of Ce(1)-Cu(3) bond distances ranging from 3.05-3.43 Å. There are a spread of Ce(1)-Cu(5) bond distances ranging from 2.96-3.38 Å. The Ce(1)-Sn(2) bond length is 3.35 Å. There are a spread of Ce(1)-Sn(1) bond distances ranging from 3.49-3.54 Å. In the second Ce site, Ce(2) is bonded in a 16-coordinate geometry to one Cu(1), one Cu(4), two equivalent Cu(2), two equivalent Cu(8), three equivalent Cu(6), three equivalent Cu(7), one Sn(1), and three equivalent Sn(2) atoms. The Ce(2)-Cu(1) bond length is 2.91 Å. The Ce(2)-Cu(4) bond length is 3.13 Å. There is one shorter (2.92 Å) and one longer (2.97 Å) Ce(2)-Cu(2) bond length. There is one shorter (2.95 Å) and one longer (3.20 Å) Ce(2)-Cu(8) bond length. There are a spread of Ce(2)-Cu(6) bond distances ranging from 3.04-3.46 Å. There are a spread of Ce(2)-Cu(7) bond distances ranging from 2.98-3.41 Å. The Ce(2)-Sn(1) bond length is 3.33 Å. There are a spread of Ce(2)-Sn(2) bond distances ranging from 3.47-3.56 Å. There are eight inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 8-coordinate geometry to one Ce(2), two equivalent Ce(1), one Cu(5), one Cu(6), one Cu(7), one Cu(8), one Sn(1), and one Sn(2) atom. The Cu(1)-Cu(5) bond length is 2.47 Å. The Cu(1)-Cu(6) bond length is 2.44 Å. The Cu(1)-Cu(7) bond length is 2.64 Å. The Cu(1)-Cu(8) bond length is 2.72 Å. The Cu(1)-Sn(1) bond length is 2.80 Å. The Cu(1)-Sn(2) bond length is 3.34 Å. In the second Cu site, Cu(2) is bonded in a 8-coordinate geometry to one Ce(1), two equivalent Ce(2), one Cu(3), one Cu(4), one Cu(5), one Cu(7), and two equivalent Sn(2) atoms. The Cu(2)-Cu(3) bond length is 2.42 Å. The Cu(2)-Cu(4) bond length is 2.66 Å. The Cu(2)-Cu(5) bond length is 2.68 Å. The Cu(2)-Cu(7) bond length is 2.46 Å. There is one shorter (2.85 Å) and one longer (3.28 Å) Cu(2)-Sn(2) bond length. In the third Cu site, Cu(3) is bonded in a 10-coordinate geometry to three equivalent Ce(1), one Cu(2), one Cu(4), one Cu(8), two equivalent Cu(5), one Sn(1), and one Sn(2) atom. The Cu(3)-Cu(4) bond length is 2.55 Å. The Cu(3)-Cu(8) bond length is 2.57 Å. There is one shorter (2.58 Å) and one longer (2.66 Å) Cu(3)-Cu(5) bond length. The Cu(3)-Sn(1) bond length is 2.64 Å. The Cu(3)-Sn(2) bond length is 2.61 Å. In the fourth Cu site, Cu(4) is bonded in a 9-coordinate geometry to one Ce(2), two equivalent Ce(1), one Cu(2), one Cu(3), one Cu(5), one Cu(6), one Sn(1), and one Sn(2) atom. The Cu(4)-Cu(5) bond length is 2.56 Å. The Cu(4)-Cu(6) bond length is 2.58 Å. The Cu(4)-Sn(1) bond length is 2.73 Å. The Cu(4)-Sn(2) bond length is 2.73 Å. In the fifth Cu site, Cu(5) is bonded in a 10-coordinate geometry to three equivalent Ce(1), one Cu(1), one Cu(2), one Cu(4), two equivalent Cu(3), and two equivalent Sn(1) atoms. There is one shorter (2.68 Å) and one longer (2.83 Å) Cu(5)-Sn(1) bond length. In the sixth Cu site, Cu(6) is bonded in a 10-coordinate geometry to three equivalent Ce(2), one Cu(1), one Cu(4), one Cu(8), two equivalent Cu(7), one Sn(1), and one Sn(2) atom. The Cu(6)-Cu(8) bond length is 2.61 Å. There is one shorter (2.59 Å) and one longer (2.65 Å) Cu(6)-Cu(7) bond length. The Cu(6)-Sn(1) bond length is 2.62 Å. The Cu(6)-Sn(2) bond length is 2.63 Å. In the seventh Cu site, Cu(7) is bonded in a 10-coordinate geometry to three equivalent Ce(2), one Cu(1), one Cu(2), one Cu(8), two equivalent Cu(6), and two equivalent Sn(2) atoms. The Cu(7)-Cu(8) bond length is 2.61 Å. There is one shorter (2.68 Å) and one longer (2.81 Å) Cu(7)-Sn(2) bond length. In the eighth Cu site, Cu(8) is bonded in a 9-coordinate geometry to one Ce(1), two equivalent Ce(2), one Cu(1), one Cu(3), one Cu(6), one Cu(7), one Sn(1), and one Sn(2) atom. The Cu(8)-Sn(1) bond length is 2.75 Å. The Cu(8)-Sn(2) bond length is 2.70 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 8-coordinate geometry to one Ce(2), three equivalent Ce(1), one Cu(1), one Cu(3), one Cu(4), one Cu(6), one Cu(8), and two equivalent Cu(5) atoms. In the second Sn site, Sn(2) is bonded in a 13-coordinate geometry to one Ce(1), three equivalent Ce(2), one Cu(1), one Cu(3), one Cu(4), one Cu(6), one Cu(8), two equivalent Cu(2), and two equivalent Cu(7) atoms.