Sm2NiSn4 crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 10-coordinate geometry to two equivalent Sn(1), two equivalent Sn(2), two equivalent Sn(3), and four equivalent Sn(4) atoms. In the second Sm site, Sm(2) is bonded in a 14-coordinate geometry to four equivalent Ni(1), two equivalent Sn(1), two equivalent Sn(2), two equivalent Sn(4), and four equivalent Sn(3) atoms. Ni(1) is bonded in a 5-coordinate geometry to four equivalent Sm(2), one Sn(3), two equivalent Sn(1), and two equivalent Sn(2) atoms. There are four inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 10-coordinate geometry to two equivalent Sm(1), two equivalent Sm(2), two equivalent Ni(1), and four equivalent Sn(2) atoms. In the second Sn site, Sn(2) is bonded in a 10-coordinate geometry to two equivalent Sm(1), two equivalent Sm(2), two equivalent Ni(1), and four equivalent Sn(1) atoms. In the third Sn site, Sn(3) is bonded in a 9-coordinate geometry to two equivalent Sm(1), four equivalent Sm(2), one Ni(1), and two equivalent Sn(4) atoms. In the fourth Sn site, Sn(4) is bonded in a 8-coordinate geometry to two equivalent Sm(2), four equivalent Sm(1), and two equivalent Sn(3) atoms.
Sm2NiSn4 crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 10-coordinate geometry to two equivalent Sn(1), two equivalent Sn(2), two equivalent Sn(3), and four equivalent Sn(4) atoms. Both Sm(1)-Sn(1) bond lengths are 3.27 Å. Both Sm(1)-Sn(2) bond lengths are 3.26 Å. Both Sm(1)-Sn(3) bond lengths are 3.42 Å. All Sm(1)-Sn(4) bond lengths are 3.24 Å. In the second Sm site, Sm(2) is bonded in a 14-coordinate geometry to four equivalent Ni(1), two equivalent Sn(1), two equivalent Sn(2), two equivalent Sn(4), and four equivalent Sn(3) atoms. All Sm(2)-Ni(1) bond lengths are 3.51 Å. Both Sm(2)-Sn(1) bond lengths are 3.49 Å. Both Sm(2)-Sn(2) bond lengths are 3.50 Å. Both Sm(2)-Sn(4) bond lengths are 3.67 Å. All Sm(2)-Sn(3) bond lengths are 3.33 Å. Ni(1) is bonded in a 5-coordinate geometry to four equivalent Sm(2), one Sn(3), two equivalent Sn(1), and two equivalent Sn(2) atoms. The Ni(1)-Sn(3) bond length is 2.46 Å. Both Ni(1)-Sn(1) bond lengths are 2.54 Å. Both Ni(1)-Sn(2) bond lengths are 2.55 Å. There are four inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 10-coordinate geometry to two equivalent Sm(1), two equivalent Sm(2), two equivalent Ni(1), and four equivalent Sn(2) atoms. All Sn(1)-Sn(2) bond lengths are 3.18 Å. In the second Sn site, Sn(2) is bonded in a 10-coordinate geometry to two equivalent Sm(1), two equivalent Sm(2), two equivalent Ni(1), and four equivalent Sn(1) atoms. In the third Sn site, Sn(3) is bonded in a 9-coordinate geometry to two equivalent Sm(1), four equivalent Sm(2), one Ni(1), 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 8-coordinate geometry to two equivalent Sm(2), four equivalent Sm(1), and two equivalent Sn(3) atoms.