Sm2NiSn4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 13-coordinate geometry to three equivalent Ni(1), one Sn(1), three equivalent Sn(2), three equivalent Sn(3), and three equivalent Sn(4) atoms. In the second Sm site, Sm(2) is bonded in a 12-coordinate geometry to two equivalent Ni(1), one Sn(2), three equivalent Sn(1), three equivalent Sn(3), and three equivalent Sn(4) atoms. Ni(1) is bonded in a 10-coordinate geometry to two equivalent Sm(2), three equivalent Sm(1), one Sn(1), one Sn(4), and three equivalent Sn(2) atoms. There are four inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 7-coordinate geometry to one Sm(1), three equivalent Sm(2), one Ni(1), and two equivalent Sn(1) atoms. In the second Sn site, Sn(2) is bonded in a 7-coordinate geometry to one Sm(2), three equivalent Sm(1), and three equivalent Ni(1) atoms. In the third Sn site, Sn(3) is bonded in a 8-coordinate geometry to three equivalent Sm(1), three equivalent Sm(2), and two equivalent Sn(4) atoms. In the fourth Sn site, Sn(4) is bonded in a 9-coordinate geometry to three equivalent Sm(1), three equivalent Sm(2), one Ni(1), and two equivalent Sn(3) atoms.
Sm2NiSn4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 13-coordinate geometry to three equivalent Ni(1), one Sn(1), three equivalent Sn(2), three equivalent Sn(3), and three equivalent Sn(4) atoms. There are two shorter (3.52 Å) and one longer (3.55 Å) Sm(1)-Ni(1) bond length. The Sm(1)-Sn(1) bond length is 3.43 Å. There are two shorter (3.25 Å) and one longer (3.39 Å) Sm(1)-Sn(2) bond length. There are two shorter (3.27 Å) and one longer (3.67 Å) Sm(1)-Sn(3) bond length. There are two shorter (3.28 Å) and one longer (3.40 Å) Sm(1)-Sn(4) bond length. In the second Sm site, Sm(2) is bonded in a 12-coordinate geometry to two equivalent Ni(1), one Sn(2), three equivalent Sn(1), three equivalent Sn(3), and three equivalent Sn(4) atoms. Both Sm(2)-Ni(1) bond lengths are 3.33 Å. The Sm(2)-Sn(2) bond length is 3.42 Å. There is one shorter (3.21 Å) and two longer (3.49 Å) Sm(2)-Sn(1) bond lengths. There are two shorter (3.27 Å) and one longer (3.65 Å) Sm(2)-Sn(3) bond length. There are two shorter (3.25 Å) and one longer (3.39 Å) Sm(2)-Sn(4) bond length. Ni(1) is bonded in a 10-coordinate geometry to two equivalent Sm(2), three equivalent Sm(1), one Sn(1), one Sn(4), and three equivalent Sn(2) atoms. The Ni(1)-Sn(1) bond length is 2.49 Å. The Ni(1)-Sn(4) bond length is 2.51 Å. There are two shorter (2.53 Å) and one longer (2.60 Å) Ni(1)-Sn(2) bond length. There are four inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 7-coordinate geometry to one Sm(1), three equivalent Sm(2), one Ni(1), and two equivalent Sn(1) atoms. Both Sn(1)-Sn(1) bond lengths are 2.97 Å. In the second Sn site, Sn(2) is bonded in a 7-coordinate geometry to one Sm(2), three equivalent Sm(1), and three equivalent Ni(1) atoms. In the third Sn site, Sn(3) is bonded in a 8-coordinate geometry to three equivalent Sm(1), three equivalent Sm(2), and two equivalent Sn(4) atoms. Both Sn(3)-Sn(4) bond lengths are 2.96 Å. In the fourth Sn site, Sn(4) is bonded in a 9-coordinate geometry to three equivalent Sm(1), three equivalent Sm(2), one Ni(1), and two equivalent Sn(3) atoms.