Gd3Ni19B10 crystallizes in the monoclinic C2/m space group. There are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 20-coordinate geometry to one Ni(4), one Ni(7), two equivalent Ni(2), two equivalent Ni(6), four equivalent Ni(3), four equivalent Ni(5), two equivalent B(1), two equivalent B(2), and two equivalent B(3) atoms. In the second Gd site, Gd(2) is bonded in a 14-coordinate geometry to two equivalent Ni(1), two equivalent Ni(4), two equivalent Ni(7), four equivalent Ni(2), and four equivalent Ni(3) atoms. There are seven inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 4-coordinate geometry to two equivalent Gd(2), two equivalent Ni(7), and four equivalent B(3) atoms. In the second Ni site, Ni(2) is bonded in a 4-coordinate geometry to one Gd(1), one Gd(2), two equivalent Ni(5), one B(2), one B(3), and two equivalent B(1) atoms. In the third Ni site, Ni(3) is bonded in a 3-coordinate geometry to one Gd(2), two equivalent Gd(1), one Ni(5), one B(2), and two equivalent B(3) atoms. In the fourth Ni site, Ni(4) is bonded in a 5-coordinate geometry to one Gd(1), one Gd(2), one Ni(7), two equivalent Ni(5), two equivalent B(1), and two equivalent B(3) atoms. In the fifth Ni site, Ni(5) is bonded in a 13-coordinate geometry to two equivalent Gd(1), one Ni(3), one Ni(4), one Ni(5), one Ni(6), one Ni(7), two equivalent Ni(2), two equivalent B(1), and two equivalent B(3) atoms. In the sixth Ni site, Ni(6) is bonded in a 5-coordinate geometry to two equivalent Gd(1), two equivalent Ni(5), two equivalent B(1), and two equivalent B(2) atoms. In the seventh Ni site, Ni(7) is bonded in a 10-coordinate geometry to one Gd(1), one Gd(2), one Ni(1), one Ni(4), two equivalent Ni(5), two equivalent B(1), and two equivalent B(3) atoms. There are three inequivalent B sites. In the first B site, B(1) is bonded in a 9-coordinate geometry to one Gd(1), one Ni(4), one Ni(6), one Ni(7), two equivalent Ni(2), two equivalent Ni(5), and one B(1) atom. In the second B site, B(2) is bonded in a 9-coordinate geometry to two equivalent Gd(1), two equivalent Ni(2), two equivalent Ni(3), two equivalent Ni(6), and one B(2) atom. In the third B site, B(3) is bonded in a 9-coordinate geometry to one Gd(1), one Ni(1), one Ni(2), one Ni(4), one Ni(7), two equivalent Ni(3), and two equivalent Ni(5) atoms.
Gd3Ni19B10 crystallizes in the monoclinic C2/m space group. There are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 20-coordinate geometry to one Ni(4), one Ni(7), two equivalent Ni(2), two equivalent Ni(6), four equivalent Ni(3), four equivalent Ni(5), two equivalent B(1), two equivalent B(2), and two equivalent B(3) atoms. The Gd(1)-Ni(4) bond length is 3.15 Å. The Gd(1)-Ni(7) bond length is 2.83 Å. Both Gd(1)-Ni(2) bond lengths are 2.83 Å. There is one shorter (2.81 Å) and one longer (2.94 Å) Gd(1)-Ni(6) bond length. There are two shorter (2.96 Å) and two longer (3.05 Å) Gd(1)-Ni(3) bond lengths. There are two shorter (2.97 Å) and two longer (3.12 Å) Gd(1)-Ni(5) bond lengths. Both Gd(1)-B(1) bond lengths are 2.86 Å. Both Gd(1)-B(2) bond lengths are 2.92 Å. Both Gd(1)-B(3) bond lengths are 2.78 Å. In the second Gd site, Gd(2) is bonded in a 14-coordinate geometry to two equivalent Ni(1), two equivalent Ni(4), two equivalent Ni(7), four equivalent Ni(2), and four equivalent Ni(3) atoms. Both Gd(2)-Ni(1) bond lengths are 2.88 Å. Both Gd(2)-Ni(4) bond lengths are 2.83 Å. Both Gd(2)-Ni(7) bond lengths are 2.77 Å. All Gd(2)-Ni(2) bond lengths are 2.78 Å. All Gd(2)-Ni(3) bond lengths are 2.87 Å. There are seven inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 4-coordinate geometry to two equivalent Gd(2), two equivalent Ni(7), and four equivalent B(3) atoms. Both Ni(1)-Ni(7) bond lengths are 2.41 Å. All Ni(1)-B(3) bond lengths are 2.26 Å. In the second Ni site, Ni(2) is bonded in a 4-coordinate geometry to one Gd(1), one Gd(2), two equivalent Ni(5), one B(2), one B(3), and two equivalent B(1) atoms. There is one shorter (2.37 Å) and one longer (2.49 Å) Ni(2)-Ni(5) bond length. The Ni(2)-B(2) bond length is 2.08 Å. The Ni(2)-B(3) bond length is 2.15 Å. There is one shorter (2.09 Å) and one longer (2.12 Å) Ni(2)-B(1) bond length. In the third Ni site, Ni(3) is bonded in a 3-coordinate geometry to one Gd(2), two equivalent Gd(1), one Ni(5), one B(2), and two equivalent B(3) atoms. The Ni(3)-Ni(5) bond length is 2.48 Å. The Ni(3)-B(2) bond length is 2.09 Å. There is one shorter (2.06 Å) and one longer (2.16 Å) Ni(3)-B(3) bond length. In the fourth Ni site, Ni(4) is bonded in a 5-coordinate geometry to one Gd(1), one Gd(2), one Ni(7), two equivalent Ni(5), two equivalent B(1), and two equivalent B(3) atoms. The Ni(4)-Ni(7) bond length is 2.50 Å. Both Ni(4)-Ni(5) bond lengths are 2.44 Å. Both Ni(4)-B(1) bond lengths are 2.11 Å. Both Ni(4)-B(3) bond lengths are 2.03 Å. In the fifth Ni site, Ni(5) is bonded in a 13-coordinate geometry to two equivalent Gd(1), one Ni(3), one Ni(4), one Ni(5), one Ni(6), one Ni(7), two equivalent Ni(2), two equivalent B(1), and two equivalent B(3) atoms. The Ni(5)-Ni(5) bond length is 2.46 Å. The Ni(5)-Ni(6) bond length is 2.64 Å. The Ni(5)-Ni(7) bond length is 2.41 Å. There is one shorter (2.14 Å) and one longer (2.25 Å) Ni(5)-B(1) bond length. There is one shorter (2.12 Å) and one longer (2.34 Å) Ni(5)-B(3) bond length. In the sixth Ni site, Ni(6) is bonded in a 5-coordinate geometry to two equivalent Gd(1), two equivalent Ni(5), two equivalent B(1), and two equivalent B(2) atoms. Both Ni(6)-B(1) bond lengths are 2.12 Å. Both Ni(6)-B(2) bond lengths are 2.04 Å. In the seventh Ni site, Ni(7) is bonded in a 10-coordinate geometry to one Gd(1), one Gd(2), one Ni(1), one Ni(4), two equivalent Ni(5), two equivalent B(1), and two equivalent B(3) atoms. Both Ni(7)-B(1) bond lengths are 2.09 Å. Both Ni(7)-B(3) bond lengths are 2.28 Å. There are three inequivalent B sites. In the first B site, B(1) is bonded in a 9-coordinate geometry to one Gd(1), one Ni(4), one Ni(6), one Ni(7), two equivalent Ni(2), two equivalent Ni(5), and one B(1) atom. The B(1)-B(1) bond length is 1.79 Å. In the second B site, B(2) is bonded in a 9-coordinate geometry to two equivalent Gd(1), two equivalent Ni(2), two equivalent Ni(3), two equivalent Ni(6), and one B(2) atom. The B(2)-B(2) bond length is 2.03 Å. In the third B site, B(3) is bonded in a 9-coordinate geometry to one Gd(1), one Ni(1), one Ni(2), one Ni(4), one Ni(7), two equivalent Ni(3), and two equivalent Ni(5) atoms.