Dy2Ni7Sn3 is Bergman Structure: Mg32(Al,Zn)49 Bergman-like structured and crystallizes in the orthorhombic Cmce space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 14-coordinate geometry to two equivalent Ni(2), two equivalent Ni(4), four equivalent Ni(5), two equivalent Sn(3), and four equivalent Sn(2) atoms. In the second Dy site, Dy(2) is bonded in a 9-coordinate geometry to two equivalent Ni(1), two equivalent Ni(2), six equivalent Ni(3), two equivalent Sn(3), and four equivalent Sn(1) atoms. There are five inequivalent Ni sites. In the first Ni site, Ni(5) is bonded in a 7-coordinate geometry to four equivalent Dy(1), one Ni(4), two equivalent Sn(2), and two equivalent Sn(3) atoms. In the second Ni site, Ni(1) is bonded in a 12-coordinate geometry to two equivalent Dy(2), one Ni(4), two equivalent Ni(3), four equivalent Ni(2), one Sn(2), and two equivalent Sn(1) atoms. In the third Ni site, Ni(2) is bonded in a 11-coordinate geometry to one Dy(1), one Dy(2), one Ni(2), one Ni(3), one Ni(4), two equivalent Ni(1), one Sn(1), one Sn(3), and two equivalent Sn(2) atoms. In the fourth Ni site, Ni(3) is bonded in a 10-coordinate geometry to three equivalent Dy(2), one Ni(1), one Ni(2), one Ni(3), one Ni(4), one Sn(3), and two equivalent Sn(1) atoms. In the fifth Ni site, Ni(4) is bonded in a 11-coordinate geometry to two equivalent Dy(1), one Ni(1), one Ni(5), two equivalent Ni(2), two equivalent Ni(3), one Sn(2), and two equivalent Sn(3) atoms. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 12-coordinate geometry to four equivalent Dy(2), two equivalent Ni(1), two equivalent Ni(2), and four equivalent Ni(3) atoms. In the second Sn site, Sn(2) is bonded in a 12-coordinate geometry to four equivalent Dy(1), one Ni(1), one Ni(4), two equivalent Ni(5), and four equivalent Ni(2) atoms. In the third Sn site, Sn(3) is bonded to two equivalent Dy(1), two equivalent Dy(2), two equivalent Ni(2), two equivalent Ni(3), two equivalent Ni(4), and two equivalent Ni(5) atoms to form a mixture of distorted corner and face-sharing SnDy4Ni8 cuboctahedra.
Dy2Ni7Sn3 is Bergman Structure: Mg32(Al,Zn)49 Bergman-like structured and crystallizes in the orthorhombic Cmce space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 14-coordinate geometry to two equivalent Ni(2), two equivalent Ni(4), four equivalent Ni(5), two equivalent Sn(3), and four equivalent Sn(2) atoms. Both Dy(1)-Ni(2) bond lengths are 2.88 Å. Both Dy(1)-Ni(4) bond lengths are 3.01 Å. There are two shorter (2.97 Å) and two longer (3.39 Å) Dy(1)-Ni(5) bond lengths. Both Dy(1)-Sn(3) bond lengths are 3.17 Å. There are two shorter (3.21 Å) and two longer (3.30 Å) Dy(1)-Sn(2) bond lengths. In the second Dy site, Dy(2) is bonded in a 9-coordinate geometry to two equivalent Ni(1), two equivalent Ni(2), six equivalent Ni(3), two equivalent Sn(3), and four equivalent Sn(1) atoms. There is one shorter (2.97 Å) and one longer (3.47 Å) Dy(2)-Ni(1) bond length. Both Dy(2)-Ni(2) bond lengths are 3.03 Å. There are a spread of Dy(2)-Ni(3) bond distances ranging from 2.93-3.10 Å. Both Dy(2)-Sn(3) bond lengths are 3.27 Å. There are two shorter (3.28 Å) and two longer (3.31 Å) Dy(2)-Sn(1) bond lengths. There are five inequivalent Ni sites. In the first Ni site, Ni(5) is bonded in a 7-coordinate geometry to four equivalent Dy(1), one Ni(4), two equivalent Sn(2), and two equivalent Sn(3) atoms. The Ni(5)-Ni(4) bond length is 2.60 Å. There is one shorter (2.61 Å) and one longer (2.68 Å) Ni(5)-Sn(2) bond length. Both Ni(5)-Sn(3) bond lengths are 2.69 Å. In the second Ni site, Ni(1) is bonded in a 12-coordinate geometry to two equivalent Dy(2), one Ni(4), two equivalent Ni(3), four equivalent Ni(2), one Sn(2), and two equivalent Sn(1) atoms. The Ni(1)-Ni(4) bond length is 2.40 Å. Both Ni(1)-Ni(3) bond lengths are 2.52 Å. There are two shorter (2.63 Å) and two longer (2.88 Å) Ni(1)-Ni(2) bond lengths. The Ni(1)-Sn(2) bond length is 2.57 Å. Both Ni(1)-Sn(1) bond lengths are 2.54 Å. In the third Ni site, Ni(2) is bonded in a 11-coordinate geometry to one Dy(1), one Dy(2), one Ni(2), one Ni(3), one Ni(4), two equivalent Ni(1), one Sn(1), one Sn(3), and two equivalent Sn(2) atoms. The Ni(2)-Ni(2) bond length is 2.40 Å. The Ni(2)-Ni(3) bond length is 2.51 Å. The Ni(2)-Ni(4) bond length is 2.53 Å. The Ni(2)-Sn(1) bond length is 2.71 Å. The Ni(2)-Sn(3) bond length is 2.60 Å. There is one shorter (2.57 Å) and one longer (3.01 Å) Ni(2)-Sn(2) bond length. In the fourth Ni site, Ni(3) is bonded in a 10-coordinate geometry to three equivalent Dy(2), one Ni(1), one Ni(2), one Ni(3), one Ni(4), one Sn(3), and two equivalent Sn(1) atoms. The Ni(3)-Ni(3) bond length is 2.56 Å. The Ni(3)-Ni(4) bond length is 2.63 Å. The Ni(3)-Sn(3) bond length is 2.67 Å. There is one shorter (2.53 Å) and one longer (2.68 Å) Ni(3)-Sn(1) bond length. In the fifth Ni site, Ni(4) is bonded in a 11-coordinate geometry to two equivalent Dy(1), one Ni(1), one Ni(5), two equivalent Ni(2), two equivalent Ni(3), one Sn(2), and two equivalent Sn(3) atoms. The Ni(4)-Sn(2) bond length is 2.81 Å. Both Ni(4)-Sn(3) bond lengths are 2.61 Å. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 12-coordinate geometry to four equivalent Dy(2), two equivalent Ni(1), two equivalent Ni(2), and four equivalent Ni(3) atoms. In the second Sn site, Sn(2) is bonded in a 12-coordinate geometry to four equivalent Dy(1), one Ni(1), one Ni(4), two equivalent Ni(5), and four equivalent Ni(2) atoms. In the third Sn site, Sn(3) is bonded to two equivalent Dy(1), two equivalent Dy(2), two equivalent Ni(2), two equivalent Ni(3), two equivalent Ni(4), and two equivalent Ni(5) atoms to form a mixture of distorted corner and face-sharing SnDy4Ni8 cuboctahedra.