Yb3Ni19B10 crystallizes in the monoclinic C2/m space group. There are two inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 20-coordinate geometry to one Ni(2), one Ni(3), two equivalent Ni(1), two equivalent Ni(5), four equivalent Ni(6), four equivalent Ni(7), two equivalent B(1), two equivalent B(2), and two equivalent B(3) atoms. In the second Yb site, Yb(2) is bonded in a 14-coordinate geometry to two equivalent Ni(2), two equivalent Ni(3), two equivalent Ni(4), four equivalent Ni(5), and four equivalent Ni(6) atoms. There are seven inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 5-coordinate geometry to two equivalent Yb(1), two equivalent Ni(7), two equivalent B(2), and two equivalent B(3) atoms. In the second Ni site, Ni(2) is bonded in a 6-coordinate geometry to one Yb(1), one Yb(2), one Ni(4), two equivalent Ni(7), two equivalent B(1), and two equivalent B(2) atoms. In the third Ni site, Ni(3) is bonded in a 5-coordinate geometry to one Yb(1), one Yb(2), two equivalent Ni(7), two equivalent B(1), and two equivalent B(2) atoms. In the fourth Ni site, Ni(4) is bonded in a 12-coordinate geometry to two equivalent Yb(2), two equivalent Ni(2), four equivalent Ni(6), and four equivalent B(1) atoms. In the fifth Ni site, Ni(5) is bonded in a 4-coordinate geometry to one Yb(1), one Yb(2), two equivalent Ni(7), one B(1), one B(3), and two equivalent B(2) atoms. In the sixth Ni site, Ni(6) is bonded in a 3-coordinate geometry to one Yb(2), two equivalent Yb(1), one Ni(4), one Ni(7), one B(3), and two equivalent B(1) atoms. In the seventh Ni site, Ni(7) is bonded in a 13-coordinate geometry to two equivalent Yb(1), one Ni(1), one Ni(2), one Ni(3), one Ni(6), one Ni(7), two equivalent Ni(5), two equivalent B(1), and two equivalent B(2) atoms. There are three inequivalent B sites. In the first B site, B(1) is bonded in a 9-coordinate geometry to one Yb(1), one Ni(2), one Ni(3), one Ni(4), one Ni(5), two equivalent Ni(6), and two equivalent Ni(7) atoms. In the second B site, B(2) is bonded in a 9-coordinate geometry to one Yb(1), one Ni(1), one Ni(2), one Ni(3), two equivalent Ni(5), two equivalent Ni(7), and one B(2) atom. In the third B site, B(3) is bonded in a 9-coordinate geometry to two equivalent Yb(1), two equivalent Ni(1), two equivalent Ni(5), two equivalent Ni(6), and one B(3) atom.
Yb3Ni19B10 crystallizes in the monoclinic C2/m space group. There are two inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 20-coordinate geometry to one Ni(2), one Ni(3), two equivalent Ni(1), two equivalent Ni(5), four equivalent Ni(6), four equivalent Ni(7), two equivalent B(1), two equivalent B(2), and two equivalent B(3) atoms. The Yb(1)-Ni(2) bond length is 2.81 Å. The Yb(1)-Ni(3) bond length is 3.10 Å. There is one shorter (2.73 Å) and one longer (2.92 Å) Yb(1)-Ni(1) bond length. Both Yb(1)-Ni(5) bond lengths are 2.79 Å. There are two shorter (2.95 Å) and two longer (3.01 Å) Yb(1)-Ni(6) bond lengths. There are two shorter (2.91 Å) and two longer (3.10 Å) Yb(1)-Ni(7) bond lengths. Both Yb(1)-B(1) bond lengths are 2.76 Å. Both Yb(1)-B(2) bond lengths are 2.85 Å. Both Yb(1)-B(3) bond lengths are 2.89 Å. In the second Yb site, Yb(2) is bonded in a 14-coordinate geometry to two equivalent Ni(2), two equivalent Ni(3), two equivalent Ni(4), four equivalent Ni(5), and four equivalent Ni(6) atoms. Both Yb(2)-Ni(2) bond lengths are 2.74 Å. Both Yb(2)-Ni(3) bond lengths are 2.78 Å. Both Yb(2)-Ni(4) bond lengths are 2.83 Å. All Yb(2)-Ni(5) bond lengths are 2.75 Å. All Yb(2)-Ni(6) bond lengths are 2.82 Å. There are seven inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 5-coordinate geometry to two equivalent Yb(1), two equivalent Ni(7), two equivalent B(2), and two equivalent B(3) atoms. Both Ni(1)-Ni(7) bond lengths are 2.60 Å. Both Ni(1)-B(2) bond lengths are 2.10 Å. Both Ni(1)-B(3) bond lengths are 2.02 Å. In the second Ni site, Ni(2) is bonded in a 6-coordinate geometry to one Yb(1), one Yb(2), one Ni(4), two equivalent Ni(7), two equivalent B(1), and two equivalent B(2) atoms. The Ni(2)-Ni(4) bond length is 2.38 Å. Both Ni(2)-Ni(7) bond lengths are 2.39 Å. Both Ni(2)-B(1) bond lengths are 2.27 Å. Both Ni(2)-B(2) bond lengths are 2.05 Å. In the third Ni site, Ni(3) is bonded in a 5-coordinate geometry to one Yb(1), one Yb(2), two equivalent Ni(7), two equivalent B(1), and two equivalent B(2) atoms. Both Ni(3)-Ni(7) bond lengths are 2.41 Å. Both Ni(3)-B(1) bond lengths are 2.01 Å. Both Ni(3)-B(2) bond lengths are 2.08 Å. In the fourth Ni site, Ni(4) is bonded in a 12-coordinate geometry to two equivalent Yb(2), two equivalent Ni(2), four equivalent Ni(6), and four equivalent B(1) atoms. All Ni(4)-Ni(6) bond lengths are 2.52 Å. All Ni(4)-B(1) bond lengths are 2.23 Å. In the fifth Ni site, Ni(5) is bonded in a 4-coordinate geometry to one Yb(1), one Yb(2), two equivalent Ni(7), one B(1), one B(3), and two equivalent B(2) atoms. There is one shorter (2.35 Å) and one longer (2.48 Å) Ni(5)-Ni(7) bond length. The Ni(5)-B(1) bond length is 2.09 Å. The Ni(5)-B(3) bond length is 2.05 Å. There is one shorter (2.08 Å) and one longer (2.09 Å) Ni(5)-B(2) bond length. In the sixth Ni site, Ni(6) is bonded in a 3-coordinate geometry to one Yb(2), two equivalent Yb(1), one Ni(4), one Ni(7), one B(3), and two equivalent B(1) atoms. The Ni(6)-Ni(7) bond length is 2.44 Å. The Ni(6)-B(3) bond length is 2.06 Å. There is one shorter (2.04 Å) and one longer (2.13 Å) Ni(6)-B(1) bond length. In the seventh Ni site, Ni(7) is bonded in a 13-coordinate geometry to two equivalent Yb(1), one Ni(1), one Ni(2), one Ni(3), one Ni(6), one Ni(7), two equivalent Ni(5), two equivalent B(1), and two equivalent B(2) atoms. The Ni(7)-Ni(7) bond length is 2.41 Å. There is one shorter (2.10 Å) and one longer (2.32 Å) Ni(7)-B(1) bond length. There is one shorter (2.10 Å) and one longer (2.21 Å) Ni(7)-B(2) bond length. There are three inequivalent B sites. In the first B site, B(1) is bonded in a 9-coordinate geometry to one Yb(1), one Ni(2), one Ni(3), one Ni(4), one Ni(5), two equivalent Ni(6), and two equivalent Ni(7) atoms. In the second B site, B(2) is bonded in a 9-coordinate geometry to one Yb(1), one Ni(1), one Ni(2), one Ni(3), two equivalent Ni(5), two equivalent Ni(7), and one B(2) atom. The B(2)-B(2) bond length is 1.81 Å. In the third B site, B(3) is bonded in a 9-coordinate geometry to two equivalent Yb(1), two equivalent Ni(1), two equivalent Ni(5), two equivalent Ni(6), and one B(3) atom. The B(3)-B(3) bond length is 1.99 Å.